I am on birth control, I take it around 12 everyday and have never missed a pill. Me and my boyfriend had unprotected sex a week ago and he did not finish inside me. My period came 2 days after that but it only lasted for a day and a half and then it was over. I'm worrying is there any possible way I could be pregnant? I feel sick and I can't sleep. Help please.

Yes, you could still be pregnant as there is no form of birth control that is 100% effective.