I've already been to the doctor, and gotten a UTI check, ect. This all started after I ejaculated and I noticed a bit of blood after. But now it happens when I urinate, there is usually a slight delay when I start to urinate, then it almost feels like when you urinate with a boner. After I'm done there is usually a couple drops of blood. The doctor said it looks like irritation could be a problem. Possibly a cut. And I got prescribed an antibiotic. It's very bothersome because I can't ejaculate or else it'll start to bleed after. Almost like a nose bleed. I don't have STD's or anything. What could this be? And what can I do? I'm 18 by the way.