So this month I'm on my 3rd month of birth control.. But last month my period came on week 3 on the second to last pill.. Now I'm on my 3rd month on my 2nd inactive pill and my period isn't here yet. My boyfriend and I experimented without a condom for maybe 2-3 minutes and I'm sure some precum got in me. The last time he came was 2-3 days before the moment we did it without one. There was never cum though. Should I be worried?