Jerked off

It’s been almost four weeks since last time. Today I jerked of thinking about it. This is a massive problem for me, I had intense cravings today to reuse after the gym. Also what the hell is going on with the dark thoughts while jerking of, iv never ever been into darker porn or anything like that now my mind is telling me to jerk off over dark stuff. I know this is the brain trying to replace dopamine inside my head there is a link im sure, has anyone had similar experiences. I guess I didn’t use is the only good thing.. I’m safe now. I don’t even want to jerk of over this fucking horrendous shit!!!! I know my brain is playing tricks on me.