J.R.
First of all I want to commend you for asking for help and advice. I also had postpartem depression with my first child and I didn't have it bad enough to see anyone but there's definitely no reason to feel down on yourself about it. It can happen to ANYONE. It doesn't matter what kind of person you are or even how much support you have. It's a chemical thing going on inside your body that the meds will help you with. If you want more info from a Dr. you could always talk to your child's ped too or go and see another Dr. Tell them when you make the apt that you need someone that will sit and talk with you about it and about the meds.
Another good resource would be something like a message board on ivillage. There are lots of boards about tons of topics and everyone on the is just like you. Here, I looked it up, this is the postpartem depression board: http://messageboards.ivillage.com/iv-ppppd
When I miscarried a few years ago I went on the miscarriage board and it was SO wonderful to be able to chat with other Moms that were going through the exact same thing that I was. You definitely won't feel alone. I'm sure they'll know all about your meds too.
Best wishes, you will get through this.
J.
Mom to 4 going on 5.