I am 19 Years old guy. About 3 months ago when I was masturbating I jerked off my penis backward too hard. At the moment I could feel tha something just broke in my penis. When I looked at it was bleeding. Again after 2 months when I tried to masturbate It started to bleed when I was about to cum. When it is not erected the upper cover moves very efficiently without any pain. But during erection when I try to slip the cover backward it get struck in the way. Before the injury the functioning of my pennis was perfectly normal. Please help me. What should I do. When I observe my pennis I could feel that the skin that is connecting upper bulged part and covering is not allowing the skin to move backward completely.