[NSFW] How should I come out of this addiction?

I have turned into a masturbation addict, I think.
I know its benefits, but it’s getting over me now.
I waste too much time daily in masturbating; 5/6 hours on an average, and sometimes more than that. It happens to me, when I close my eyes, I see all the stuff, ... you know. I don’t think of any other thing than this. When I do engage in some other things, my mind gets me back to all erotic things. So, I’m unable to do things as effectively as I could have otherwise.
Another thing, when I masturbate multiple times, I feel weak. This got me to catch cold, fever, cough at times. I am much more vulnerable to diseases now than I was before.

What suggestions can you offer to me?
Should I stick to some schedule? How do I get rid of these thoughts when I’m working or doing other things?
How many times should one ideally masturbate? Had there been any study or research on this?

Well, I am grown up male in around thirties.
If I don’t masturbate for a couple of days, I feel I’ll spill over. A couple of times, it pained in testes, but felt better after masturbating.