Amazonmom...hugs if all right

I offer my apology for not knowing more about your situation, but I'd still like to share with you, partly from my own experience and just my opinion.
If you are comfortable with this physician, then have that face-to-face/heart-to-heart talk with her.
Don't hold back anything even if you have to write it out--or print your post and give it to her.

Your concerns and frustrations are valid as I'm sure you know...
"I know this is dumb...but I didn't think I was signing up for mood stabilizers and antipsychotics when I asked her for help with postpartum depression..."
We have to be our own patient advocate, if her treatment protocol is feeling overwhelming then address it with her.
It's something I learned very early to do, being a nurse was a definite advantage for me.
That and being an in-your-face-type of person.
It wasn't that way at first, as I said, I had to learn it.

Sorry for the ramble, Amazonmom.
Your frustration is clear and I wish I had words of wisdom for you.

Catherine