I am currently eating chocolate in support of the OP 
Can I tell you my story? I am currently on 50mg Sertraline and have been for about 2 months or just over. My situation arose differently, though is also related to babies, sort of.
I didn't have Post Natal Depression after either of my babies, in that I think it has to occur (though needn't be diagnosed) within 6 months of the baby being born for it to be officially classed as that though I might be wrong. Anyway.
I had no depression after my first child, a son, I really enjoyed being a new mum and everything was great. I went to college when he was one, just one night a week, and got to go out and be "me" once a week, as I didn't return to work. Then I had my daugther when he was 2 years old, and that was fine too, another easy baby, good sleeper etc. No depression - sometimes felt a bit exhausted and frazzled with 2 very young children but nothing bad.
But then at the start of the year when my daughter was one and my son 3, I got pneumonia. It went on and on and on. 6 courses of antibiotics to clear the infection (and that was just the fevers and chills and urgent coughing) and I had pleurisey as well as a complication of that (where it hurt to cough). Once they infection was officially gone I still coughed and wheezed for months, until August really. So basically the whole year has been shit. During the worst of it (all they way till April or May really) I would cough the minute I lay down until about 4am when I could finally drop off to sleep as it sort of goes dormant eventually (this was with cough suppressants and codeine and everything) and then I'd catch 3 hours of fitfil sleep until it was time to get up for the preschool run. On non preschool days I'd just lie there with kids crawling over me until I could drag myself up and give them breakfast. One day, my son had chocolate spread on toast for breakfast and again for lunch, and if DH hadn't come home when I collapsed with fever in the late afternoon he probably would have had it for dinner as well! I just couldn't cope. DH took a little time off but I was sick for months, there's only so much time he could take off. We have no family nearby.
Anyway this did change my mental state and possibly my brain chemicals and I gradually sunk into mild depression. I'm not really a "crying" type person to be honest so it sort of manifested itself as a stressy response - irritated snappy snipey attitude. I had my mirena coil removed because I thought that had caused me to become hormonal and premenstural (but all month long). Some days my son only had to open his mouth and I'd look at him like this 
and go "what?!" and then scowl, before I realised I was being horrible and mean for no reason and taking my mood out on him etc. I realised that I was like this more and more often and that as I wasn't somehow able to snap out of it, and nothing could control it, it would start to effect my relationship with him and that I needed help, though even at that point I didn't seek help, though I meant to, I couldn't bring myself to admit it enough to make that appointment. I was never in a good mood, either. Okay so I might not cry but I was driving along in June and it was a perfect summer's day and I'd just dropped the children off (it was my child-free day I have once a week) so I should have been full of the joys of spring yet I was driving along scowling with this big black cloud of pissed offness about me but for absolutely no reason whatsoever! That's not normal! Its not right.
It all came to a head when I developed stomach pain. Really bad, debilitating stomach pain. I thought I had an ulcer or something, or maybe appendicitis, nothing made it feel better. So I went to the doctor about that, burst into the room in a tizz because I'd got caught in traffic on the way and thought I'd missed my appointment and I had both my children with me and the baby had been trying to escape out the door but I couldn't put her in the pushchair because I didn't have time because I was late...and just dropped down in the chair next to him and burst into tears. He handed me a tissue and said "what can I do for you". I told him about the stomach pain. He examined me and said "I'm going to treat you for indigestion". I said "WTF?" because I never get indigestion, FFS! Even when I was pregnant with a 9 and a half pound baby I didn't get so much as a trifle of heartburn even after sucking a lemon! He said he believed I was "stressed". I said, oh yes, I am duh. Can that really cause indigestion? Anyway he gave me some PPI's (protein pump inhibitors, stops your tum producing acid) and told me to come back in a week. So I did. The tablets cured my acid-ravaged digestive tract but he said he wanted to get to the cause of my stress and he screened me for depression and I came out as moderately depressed (which is still fairly depressed) and I said, well, I never really cry much, only tears of frustration when something goes wrong but I'm not "sad", I'm just fucking pissed off all the time. But that is also depression, or can be! For me it was!
50mg Sertraline, a Selective Serotonin Reuptake Inhibitor, which increases the "happy" hormones in your brain. I felt like a new woman within about a day and a half - in fact I got a mild feeling of peace and elation within about 3 hours of taking it which increased from thereon. It might have been placebo, I don't know, because it is a big relief to get the help you need. But 2 months down the line I feel like a new woman!
My depression (and I don't even think of it as that, I prefer to think of it as "stress") is partly situational - husband does long hours, no family nearby, felt very alone and overwhelmed by my illness at the start of the year (it really drove home to me that there are no "sick days" or "days off" for parents) and it will change on its own. I could go back to work if I wanted. I could just get a full time nanny if I wanted - but I dont' want to. But I did increase my daughter's day care to 2 days a week recently as she is nearly 2 and that's made a huge difference to my balance. So there are things you can eventually do, or that will eventually happen that are situational that will help you lift out of the depression that can arise from having too much that overwhelms you or whatever - but in the meantime, and until you discover what that is, or at least analyse when it will come around and reassure yourself about that, the drugs will rebalance your brain and make things better. They really will. The citrolapam or whatever it had before was not the drug for you. I've had no side effects like that, you need to find one that works as well for you as mine does for me.
My GP didn't tell anyone about my depression, he didn't even contact my health visitor (though he did offer, I politely declined). Nobody has dragged me or my children away.
Just go and get help, any way you can. You won't regret it once its all in place I'm sure.
Hope I haven't cross posted or anything, I've had this essay post on my screen a while and husband chit chatting to me and some knob knocked on my door trying to flog me something and all sorts since I started it!