I think I might be pregnant?

I just had a baby Feb 2nd, was cleared to have sex at our 6 week check up. We have only had sex twice since then cuz I want to start my birth control before we get down and dirty, and we have a 9 week old, so it's hard.

so long story short, I know any time you have unprotected sex, there's a chance of pregnancy even with the pull out method. I'm also breastfeeding and I've heard that there's a possibility that my period won't be normal.

what are the chances that I'm pregnant? My period is due today and there's literally no signs of it coming. I'm scared that I am. idk what I'm gonna do if I am.