I masturbated and came to a climax 3 times in less than 24 hours, and climaxed one time after sex with my girlfriend. The tip of my penis (the two flaps if you spread it open) is red and painful. When I urinate, the tip feels like it is on fire. After I urinate, my penis is in a lot of pain for the next few minutes, almost to the point where I cant walk. I have not noticed any increase in need to urinate though.