hi. i am a bit concerned that i might possibly be pregnant. yesterday my boyfriend and i had unprotected sex for about a minute. he told me a couple of hours later that he thinks he pre ejaculated inside of me a little bit. i dont know how possible it is to get pregnant from precum. also, i am on birth control, although it is a low dose. i did have my period at the time too. i know that with all of those factors, the chances of pregnancy are HIGHLY unlikely, but i need a second oppinion. should i be concerned??