Help just had a baby pregnant again!?

I had a baby in November I hadn't had sex since before that until lastnight me and my husband did and I wakeup this morning with some cramping my period is due but I just had a baby so its irregular I took a ovulation test and get this!? Does that mean I'm ovulating right now or I'm going to? I took a plan b 8 hours after anymore been in this situation? Thank you