Masturbation i been feeling such uneasiness

Hello doc, I'm 16 years old, and lately or rather say from a year or two i been feeling such uneasiness that i cannot bear it at all. When i was i think 11(i don't know exactly), i discovered masturbation on my bathroom floor. The feeling it had was really great, and i wanted to do such a thing over and over again. I practiced masturbation in great frequency till i was 14, when i came to know what it actually was. A read a great deal about it on the Internet and found out its not good for health and all and i have cut down the practice but i simply cannot just do away with it. The urge keeps coming back, i start doing that again and again. Now the uneasiness i was talking about; due to any string bowels' movement i somewhat say ejaculate, i always have the fear that if i ejaculate it would be like ruining me,sometimes i have this huge urge to just jerk off but i have to control that which is very difficult and uneasiness.So i'm in this tension all the time. I want those days back when i don't have to worry about it, where i just did whatever i wanted to too.I think the early discovery of mine has kinda strengthen my sex drive that i cannot do away with it. suggest me something that i should do? any medication ,any exercise, anything that would make me a normal person again when i was 11; tension-free,free of all this uneasiness. Thank you, Regards, Heeman.