Me and my boyfriend have recently started having unprotected sex now for about a month or so. He ejaculated in me and the day after, I got a light period at first, then it got a little heavier and even heavier, now it has lightened up but is still there. Me and my boyfriend have had unprotected sex about 4 times at least after that (while I was still on my period) and he ejaculated in me. Is there a chance I could be pregnant?