I would probably first call your doc in the other state. Ask for what he/she recommends. Then, if it were me, I would look in the phone book for a midwife in my area. I'd call her up and say "I am suffering with ppd. I've just moved here. so-and-so was my doc where I lived before, but I need help right now."
I don't know much about bi-polar, but depression can cause mood swings, too. I've suffered with them for years. Some days, I'd feel so incredibly happy like nothing could ever go wrong and I couldn't believe I ever felt bad. Then other days, I couldn't get out of bed and I'd cry over the tiniest things. Bi-polar mood swings are much more severe (think manic highs).
Here is a website questionnaire about bipolar disorder. The website has a lot of information.
This is a site with a lot of info about depression. Granted, it's a government site, but....
If you'd like to PM me anytime you are welcome to. Anything you'd like to talk about in more detail, or whatever. I can give you my email, too, if you want it.
There are so many women who go through this. It is so hard to see it in yourself, in my experience, anyway. I've suffered with depression on and off since my teens. After I had my ds, I remember driving home from a ped appointment (I lived an hour away, so it was a long drive), and I was on an overpass. I thought to myself, what would happen if I just drove right off this overpass? Now, I didn't want to kill myself, really, but the fact that I thought it immediately sent up a red flag. I also used to hold my ds when he was a newborn and just cry. I thought I was the luckiest mommy in the world and I loved him so much, and I'd wonder to myself, why am I crying like this? I still have good days and bad, but I rely on my dh to tell me when I might be slipping back into depression. A lot of times, our dh's don't understand and I hope if yours is a bit less supportive than you need him to be that you have family or other friends to talk to. Let me know if I can do anything for you.