My husband left for 4 hours today to go to home depot, I never said anything about it just went about my day. Tonight I was in our bathroom and noticed the crotch area on his boxers were streaked with blood. I asked him about it and he played clueless but it is enought blood to notice it. I know when he has sex he leaves his boxers on. Should I worry he is cheating or am I being paranoid for no reason?