This is going to sound crazy but there’s a good chance you have a build up of prostatic fluid, which causes pressure and horniness. You can massage your perinuem without getting sexually aroused and release some of that fluid. It will be thick in consistency with a white/yellowish color. This is not a relapse or cumming although it will feel similar as it comes out of your penis. What you do with it after that is up to you but I think you’ll find you will feel less horny and somewhat relieved. I get this at or around day 6-7 and simply release it and go about my day. Just be careful not to chase the effect and end up relapsing.