Me and my girlfriend had sex about a week after her last period. It was protected and the condom didn't break and I pulled out. So some time went by and it had been about 40 days since her last period and we had protected sex again. Same as last time. It's been 49 days and no period she has had slight nasuea and slight cramping starting yesterday. Shes taken 2 pregancy test one at 37 days one at 41. Both negative. She's been stressing it pretty bad lately. Could maybe she missed a period? Changed cycle? She said there was very very very little blood when she wiped the 2nd time we had sex. But that was a month after the last time we had sex so it couldn't be implantation bleeding. She said it wasn't even enough to say she was spotting. We're both 16 and just scared.