My boyfriend and I had sex for the first time in about a week because i have been sick in bed with strep throat. We noticed when we turned the lights on there was a bit if blood on the sheets. I went to the bathroom and the saw blood on the toilette paper, and trying to pee almost made me cry out it hurt so bad. Should I go see a doctor? Or does this just happen after rough sex that somthing tears? This has never happened to me before.