Condom Broke.

My boyfriend and I had sex about a week and a half ago and the condom broke. He pulled out and everything went everywhere. He's not sure if he came inside of me a little or not, so I took Plan B 2 hours later. I'm on birth control (Tri Sprintec) I take it regularly. I'm currently on my 4th placebo pill. This incident happened on my 12th pill. I'm not sure of my ovulation. My period hasn't come yet.