I have masturbated since I was 13.Now I am 24 and want to stop

Masturbating but if I don't masturbate for at least one week I will have

Pain in my testicles and prostate and some sticky fluid comes out from

My penis without being orgasmed or stimulated.
Is there a serious problem with me?
Thanks

Doesn't sound like you really have a medical problem there. But, perhaps someone else can better answer your question. However, why do you wish to stop masturbating? This is not something that you "grow out of" or anything.

If you want to stop masturbating, just stop masturbating. The fluid you see is the same thing as pre-. It can seep out without having an orgasm if you have a nice little "stock pile of ammunition". You are feeling pain because you are used to relieving that pressure constantly but now that you aren't doing that you get pressure buildup which causes you to have a similar condition to "blue balls".

There is pain when stopping any addiction, both physical and mental.
If you have a real fear of a medical issue your family doctor is a great place to go, and should regually for normal check ups.

Also I don't see once a week as any real problem anyway if that is all it was. Three or four times a day would show a issue perhaps.