Spotting a week after morning after pill

Okay so idk what's going on. Last Sunday I had sex, we used a condom a majority of the time (we started without but put one on partially thru and it was on when he came). I took the morning after pill the next morning because I was panicking about the fact since I'm not on the pill. This was 2 days before I started to ovulate according to this app. Now a week later, I got what seems to be spotting but could be my period. I was supposed to get my period in two weeks. There is some cramping but not as bad as normal and I'm just wondering if anyone else has experienced this? Or had some idea what it is? Thank you!