I had protected sex on the first day of my period and the common did NOT breck that's we know of, could I of got prenant that day. And then we had sex 11 days after that day without portect. Or is it a better chance I got pernant that day. We know that I am protect but not for sure which day. We know it had to be one of them. And can you even get pregnant on your poriod if you use protect that don't breck.