The other night my wife and I noticed there was a seeming tremendous amount of blood in my semen, after intercourse. I was, of course, surprised and concerned; as was she. I have made an appointment with a urologist for next week, just so you all know. However, last night, which was a few days later, I decided to do a check . Only to discover it is still just as bloody as it was a few nights ago. What could be causing this? And should I seriously be alarmed, of it being something serious ? I am 31 years old, and have never had this problem before.