I had sex November 29, at 3 am, unprotected. I'm on birth control, and I've been taking it correctly, one day I was late by 3 hours. I took a plan b 10 hours after I had sex. I got my period around my normal time, and lasted from December 8-13. The night it ended, i started to have cramps, and still have them 4 days later. My boobs just started to hurt, like for 10 seconds. are the cramps just my hormones?