I am on regular birth control that I take every morning. But earlier this month I was out on Penicillin because I had strep throat, this can tamper with the effectiveness of hormonal birth control. So, my boyfriend and I used condoms as extra protection. But last Friday the condom broke although we realized this before he ejaculated there was stil pre-ejaculatory fluid in the condom. I was very scared so the next morning I took the plan B pill. I am now on my sugar pills in my birth control pack and should have had my period by now. I'm not sure what my next step should be.