imshaking, I don't know if I can be of any help, but just to give you a big hug. I've been there and I know what you mean about not wanting to go on about it to your RL friend. I finally went to pot in January this year, but it was a long time in coming. I'd had counselling a couple of times before and the last time was so awful that this time round I was adamant that I didn't want to talk about it, I just wanted to feel better. So I got put onto ADs. They have made a massive difference (as well as taking 6 months off work). In fact, one day last week I suddenly started to think I was crap at my job. Then when I got home I was a rubbish mum. I finally looked at my pill packet - and I'd missed 3 out of the last 4 days. So although I now feel happy, balanced, calm - everything I should be - it is because I am using chemicals to keep the right balance in my brain. I don't know why I didn't do it earlier.
You are worried about going to your GP. I was pg when I hit rock bottom. I called my HV and saw a GP and they both advised me to slow down, look after myself etc. I kept going, but felt worse and worse. Then one day I just couldn't get up, so I took the day off work. The next day I felt the same, but forced myself to go in, as I didn't feel I deserved 2 days off just because I couldn't get up. I lasted less than an hour. I couldn't make eye contact with anyone, let alone talk to them. I saw a trusted boss who told me to make a GP appointment, and went home. When I saw my GP 2 days later I was finally diagnosed with depression and never went back to work after that (I've now started a new job).
I started this year at the absolute lowest I've ever been, and am now the most content, happy, calm and balanced I've ever been. So do see your GP, and so talk to your friends. And take as long as it takes to get better.