oh i really feel for you - it's horrendous and you can't imagine it will ever end. just when you're up, you crash back down again. i haven't read the entire thread, but i think many people go through what you're experiencing, with varying degrees of severity
i didn't have fully diagnosed PND, but i had quite severe baby blues (saying that with hindisght, at the time i thought i was just going mad) I found the first few weeks of having DD absolute hell. i had an easy breezy pregnancy, then hideous labour, emergency cs and no end of problems bf. on christmas day (when dd was 2 weeks old) i thought i would lose the plot. worst xmas ever - weeping with big swollen boobs, baby screaming, whole family there listening and watching. i felt so detached from DD - i think i would have quite happily given her away and not thought twice about it, just to make the screaming stop and get a good night's sleep
it all makes you feel like you're somehow failing, because let's face it, we've all been told motherhood is this glorious state of being that just comes naturally. but the truth is nothing and nobody can prepare you for the shock of having a new baby. if you think about it, labour is hugely physically demanding just by itself - follow that with the craziest hormones ever and no sleep, you're bound to feel awful. plus, you can't hand them back or say "i don't fancy feeding him just now, i'll do it later" - it's a complete shock to the system. i actually wondered how life was managing to go on in the outside world, when i couldn't even get up or dress myself or laugh without being doubled over in pain
it does pass gradually as you get more used to eachother. he'll start smiling and engaging with you soon and things start to become a bit fun, instead of a horrible never ending shore. but 2 things that made our lives easier have been
-
sleeping DD on her front - she haaaaaated sleeping on her back. she didn't settle at all, ever, not once. As soon as we flipped her over she started sleeping several hours at a stretch. You need to consider SIDS advice and your own circumstances and risk factors, of course, but this really did go a long way to restoring some sanity
-
letting her cry every now and then, only picking her up if she went for more than say 10 minutes (having ensured she's not cold, hungry, dirty etc). it gives you a breather and DS may learn to settle himself a bit better. it's more painful to you than to him and if he goes off to sleep without help from you, so much the better
DD is 13 weeks now and the difference between now and the early days is huge - you'll get there, you really will. in the meantime, if you can do anything at all to calm yourself down, you'll be more relaxed when handling DS and hopefully this will have a positive effect too
oh, and one thing i did that was just for me and helped me get through each day was having a sacred untouchable 20 minute or so bathtime in the evening. i used to look forward to that all day long, and grab it when DD was sleeping. sometimes i would even have 2 baths a day
hang in there - and hopefully soon the good balanced bits will outweigh all the negative feelings you're having. try and focus on things that HAVE improved - eg no longer having to BF, if that was causing you problems