I can't give you a recommendation for a doctor because you're not in my area, but I can comment on the PPD.
I had bad PPD after the birth of my son, and I HATED breast-feeding. I hated it completely. I was lucky because I had a wonderful doctor, and after talking about it and watching it for a couple of weeks, I did decide to take the Prozac to help me deal with it. I continued breast-feeding, but began pumping more so that my husband could help feed more. Just as a note - my son is and always was a wonderful sleeper - I luckily noticed no side-effects to the Prozac when I went on or when I weaned off. I think this is a personal decision, and if you find a good doctor, you should talk to them about possible side-effects. I talked to my doctor about it (because I was very worried, too), and I made a decision that I would be a better mother on it than off of it. I think I was right, because I could feel when the medication kicked in, and I felt my relationship with my son change then. You may decide to make a different decision - that's okay. But you should be informed instead of relying on internet sites for your information.
As for the second child - I am currently expecting #2, so I have been talking to my doctor about it. I now realize that I was depressed during my pregnancy with Baby #1 too - I have realized it because I AM NOT feeling the same way with this pregnancy. However, my doctor has warned me that my chances of experiencing PPD with this baby are significantly increased by the fact that I had it last time. She has not mentioned the risk that it might be more severe, so I don't know if that's the case. But you need to be aware of that as you plan for the next baby.
I think you have a lot to think about and a lot of options to consider, and in order to do it, you are going to need a good doctor - one you feel confident with and can talk to about your concerns and misgivings. Since you are not yet pregnant, now might be a great time to start making appointments with OBs in the area, interview them and tell them about your past problems, and find out what they have to say. Good luck!