My girlfriend and i had sex about a month ago for the first time, around april 3rd or 4th. We had unprotected sex twice and both times i ejaculated inside of her. She had been on birth control for about two and a half months leading up to this, her reason for ever having been put on birth control was to regulate her periods since she wasnt having one very often, and on april 3rd or 4th (the day we had sex) she forgot to take her pill on time, and wound up taking it five or six hours later than usual. she has never went longer than this when forgetting to take her pill and has never missed a day. so my question is, how much will her chances of becoming pregnant be affected by six or seven hours? Also,  when we had sex she was about a week away from her next period, approximately six or seven days later, maybe five, she had her period but it was lighter than usual. i became concerened and paranoid and did alot of reasearch because like i said, im very paranoid and assumed the worst, that it might be implantation bleeding... So Its been about a month since then like i mentioned, and her period was due on monday may 6, because once again her birth control was supposed to regulate her periods. it is now tuesday may 7 and she still hasnt had her period, im wondering if i should be worried.. could she be pregnant?