I had PND for the first time 5 years ago. A complete breakdown, lost my sense of taste, smell, vision. Have very little recollection of that time. It was a huge struggle to come out of it, but I did eventually with the help of lots of meds and terrific support from family.
For a very long time afterwards, although I could see that I was making improvement (slowly but surely, I did often have bad days where I felt I couldn't cope and got quite scared that I was going down hill again. At the time, I did wonder if i would ever be free of it, but eventually I was and have never looked back.
I still go through low patched now (usual ups and downs of life) but no longer feel scared that my depression is comin back.
I think with PND though, it may be slightly different, you can almost rationalise it an know that it is down to hormones and other chemical changes and that there is a goos chance it will disappear,
Misdee, you have so much to cope with that it's not surprising you feel this way. You must feel as if everything stops and starts with you. If I lived nearer to you, I would take you out for the day and force you to let your hair down!
I really wish I could help you more x