Just started the pill, need help!!!!!!!?

I started taking tri-sprintec 28 day regimen birth control exactly two weeks ago. On the directions, it says to use a backup method of birth control for the first 7 days of use. On about the 13th day of use (I have not missed any pills) I had , no condom, and he came inside of me. Could I be pregnant? Should I worry? I will use a condom next time. I jsut need honest opinions here. Should I worry?