I used to masturbate at least one time a day up to 3 times a day never used lubrication and it was rough, I never had a problem getting hard. Now i'm 17 and one day i just stopped being able to get fully hard.. only 60-80% hard. I figured my 'big guy' might be tired so i only masturbated every few days.. after a couple weeks i started getting this pain in the head of my penis right past the shaft and only when i flex my penis while im semi hard. There's kind of a sharp pain in my anus when i flex my penis as well but it doesn't really hurt its just there. I stopped masturbating for a week thinking that was the issue but it still hasnt gone away.. im a virgin so yea.. i wanna have sex with my gf but im scared cuz i cant get fully hard. Btw im 7" long and 4.25" girth, in shape, healthy, no medical conditions if it matters. Any help please? Thank you.