Basically I had sex on the Feb 1st, forgot to take my pills for a couloir days before  we had unprotected sex but he pulled out and about 10-15seconds later he came on me. I'm scared I'm might be pregnant due to pre cum or whatever. I had a short period that started the day after I had sex for about 4/5 days. Thoughts???? Also I'm pretty sure I haven't put weight on