before my boyfriend and i decided to get serious i had met up with my ex whom is also the father to my son and we had sex while on my period twice, once on the first day and once on the third day. this was aug. 23 and 25th. i cant seem to remember if he wore a condom or if he pulled out..we ended that fling immmediately and i started seeing the new boyfriend seriously..the next week i had sex with my current boyfriend at least 3 times between the 2nd and the 6th of September..my cycles are never short, they are usually about 28 to 29 days each month..i cannot tell when i actually ovulate but with my son i only slept with him twice and conceived my son either on day 12 or 14 of my cycle. i took a pg test on sept 21 and it came up positive almost immediately. on oct 9th i had an emergency US and it said i was 6 wks 3 days...i need to know who i concieved by..if its my exes it may ruin the good thing i have going with my new boyfriend..hes ready to be a dad, but i dont think he would want to be a father to a child that isnt his..please tell me what the odds are of me concieving thru sex i had on my period..alot of sites say that a woman can get pregnant throughout the month..im really scared please help.