Placebo Week

Patient: I’m 16 and started birth control about a month and a half ago. During my placebo week, my boyfriend and I were getting in the heat of things and we started having unprotected sex a little bit. Even though he wasn’t in all the way he ejaculated a small amount in me. It has been a little over a week and I have been paranoid by finding symptoms that I am pregnant. Is there a possibility that I am pregnant?