I'd check out WebMD before you go to your doctor's appointment, but until you speak with your doctor/get the labs ran - you won't really know what the deal is.
Just a bit of background as to where I'm coming from...in my situation, I also had a baby this year and when they had me open for the C-section they said the word "biopsy" totally unexpected - to say the least. Needless to say, it took the docs from March to the middle of July to have a remote idea what was going on - but finally I got a diagnosis/treatment plan.
My advice would be to be patient. You have your appointment scheduled and there isn't much that you can do until then.
Pray to your higher power (or start) and try to focus your attention/energy on other things in your life you can control - getting good grades in your graduate classes, taking great care of your baby, being a great partner to your husband...
Also, realize that you are doing all that you can in the situation to see that you are being healthy until your doctor can give you some information that is more than a guess.
I know it's difficult not to worry/be anxious in situations like this, but until your doctor does lab work anything else is just speculation and sometimes too much speculation can lead to needless worry on your part.
Do what you can to take care of yourself before your appointment.