Hi "Bracken",
I suffered with pp following my son's birth March 06 and I sympathise with how you feel. I only felt comfortable talking about the condition a year later & I can now be open with anyone who asks. I found it VERY hard to talk to anyone except my husband & psychiatrist when I was ill. I had 3-4 months of manic behaviour and 7 months of severe depression. Personally I felt the depression was the hardest to cope with. (My family found the manic moments worse). I didn't get any mood stablilisers as they could trigger the pshycosis again, so had long black periods. Like you, I tried the baby groups etc & they were (still are) really important. I know what you mean about not wanting to talk about it, but I would try. Once I was able to open up about my illness, I found the other mums were much more supportive & understanding. Many had experiences and friends who had suffered similar experiences & I found an informal network developed.
Also, don't forget - it does get better!!! Your little girl will interact more as she grows up and entertain you rather than the other way round.
I have just found out I'm pregnant with #2, so will probable be a more regular visitor to this sight as the months go on... Apparantly I'm 90% likely to suffer from pp again, but preparing for it this time.
Good luck with the next few months.
It might be worth trying to get some CBT once you feel a bit better which is supposed to prevent/help in the long-term.