My boyfriend and I have been sexually active. We had sex December 23rd, right after my period. So, I know I didn't have sex during my ovulation time. He used a condom, and it wasn't broken, so I know that for a fact. Last night, we had sex again. Two times. When he inserted himself in me, I was a little dry, and it hurt a tiny bit. This morning, I woke up to light bleeding(I weird it off, and that was it.). I'm having cramps, feels like period cramps. P.s. When we did it last night, he used condomes, and they didn't break either. What can this be?