>>73273705What have you tried doing so far? Your body being in a rhythm of cumming at predictable times probably has at least something to do with it, in which case the first thing to do would be to break that rhythm and observe what happens. Set some ground rules for when you're allowed to fap, how many times a day, whatever. Nothing too difficult to start. I know "just stop doing it lmao" doesn't sound helpful, but it's entirely possible that you'll only need to force yourself to follow these rules for a week or less before you start following them naturally. When I started fapping every other day, I stopped missing it on the off-days before I even knew it; it was just a matter of getting myself on a different pattern. If things don't go that smoothly for you that's fine; just observe how you feel, consider if it went at least a bit smoother than you thought it would, and ask yourself what you'd be comfortable trying next.
If the pain doesn't stop, you should probably tell that to a doctor.