The Pill

Bee
So I've been taking the pill for a week. Exactly a week. I haven't missed one. Day 1 was the first day of my period, per the boxes instructions. It said after 7 days I would be safe. Today is the first day I'm off my period. My boyfriend and I had sex, and he came in me. I went to the bathroom, and tried to flush most if it out, but what are my odds of being pregnant? I'm nervous because 7 days seems so short of a time period.