@Crackers1 - if I said don’t worry about what seem to be side effects, you’d say “come on, man, this is freaking me out”. It does freak you out. I will say this - the changes you are making to your brain are huge. I watched porn for nigh on 40 years with a few breaks, and the ruts in my brain were deep. As you come into rehab you get everything from extreme libido to total asexual feelings. I can recall at one point thinking I wouldn’t get an erection if I watched a porn scene with my favourite actress in my living room. Flatlines can go on for a while. This may not help but what you are going through is totally normal. Up to a point you should be happy when it feels weird because it means you’re changing.
Cliche alert: no pain no gain.