Pre-partum/pre-natal depression and homebirth?

I'm 35-37 weeks and still not into this baby. I've tried reading the birth stories, homebirth books, the boards here thinking it'd help me get in the mindset and maybe it has a little, but I'm still not with the program. I feel like I owe my midwife (and myself) some sort of birthplan, even if it's just an oral rundown of what I do/don't want. Can't seem to care.

Truth be told, I'm mad at the world. Translation: I'd almost consider solo U/C at this point......and I don't really know why other than that I feel so physically drained, emotionally overwhelmed, and generally frustrated with the "support" people in my life.

I read up a bit on prenatal depression last night (hadn't heard of it before now). The suggested remedies are things I'd been working at already, to little avail. I have no support system allowing me a relaxing break from life, and that won't change. I try to make an effort with my diet (more protein), try to rest/sleep more, get out of the house once in a while. Helps a little.

Much of the depression with me is situational I'm sure; the rest awful awful hormones, soooo much worse than I've ever experienced before. I'm hopeful that once the hormones are through, I'll be better able to handle the situational stuff.

I'm not panicked about the birth, haven't thought about the pain, haven't mentally prepared myself one bit. And I guess I'm just wondering how my lack of preparation and connectedness to this baby is going to affect the birth. Is my normally calm self going to freak out and not be able to handle the pain, for example?

Anyone experienced prenatal depression? Any advice on how to lessen it? And lastly, what sort of effect is it going to have on the birth, on my bonding with the baby, etc.?