man i can totally relate to your problem, it seems like a very strong urge , I have to do it at times, usually 3-4 times a week or everyday for weeks at its worst. I find that it is worse depending what I eat, or supplement, like stimulating foods and herbs, make it really bad, the worst was trying adderall for my ADHD a few years ago, I was wankin it alllll day long but couldnt get an ejaculation until like 7 hours later, it was a horrible experience, maca was pretty bad too. But nowadays, I dont take stuff like that, it seems that other factors cause my horniness, like having too much pottassium or something.
And the brain fog , mental slowness is killing me, it can last for a few hours to a few days after ejaculation. Hope you can figure it out , cuz I cant.