Bleeding after going off the pill and unprotected sex

Question! My boyfriend and I decided to try for a baby. I went off the pill a week ago and we've had unprotected sex plenty of times to try. And this morning I woke up with cramping and medium bleeding (TMI). Wondering if this is withdrawal bleeding or my period. 
Does this mean I can't get pregnant this cycle. I was certain I was ovulating 2 days ago...