So I just read your whole story. I really enjoy reading how people deal with this situation. We all have our triggers, are issues, are code of honor, etc. I started because I have PIED. No doubt about it. I wanted to quit porn. I'm at 54 days today with no porn. I started, as you did with the hopes of going 90 days or even 180 days with no orgasms. My goals was not to never masturbate again, it was to quit porn. In my 54 days, I have masturbated 2 times in the shower, trying mostly to fantasize about my wife. The first time about 5 weeks in, I had a little trouble getting hard and finishing. The second time a few days ago, I got hard quick and I came quick. And it was a powerful orgasm. I'm trying not to hold my cock really hard while masturbating and I hope to develop a much softer touch in the future. So, I haven't done the 90 or 180 of no masturbation, but I have stayed away from porn and it is going way better than I anticipated.
I'm trying to get back to no masturbation for a while because I think I need to allow my body to heal, but to be honest, I don't think masturbating with no porn, little fantasy and a much lighter touch is a bad thing. It's really getting back to the basics of what masturbation should be. The use of porn is just so out of control with so many people. I was so caught up in it that it was a little insane.
Maybe you shouldn't be so strict on occasionally playing with yourself. If you can limit it to every few weeks. Maybe have an orgasm every once in a while it might be easier to stay away from porn. I don't know. It's a theory I'm working on right now. I think we naturally feel like we need a release now and then. I think porn makes us think we need it every day, 4 times a day!
Good luck and I wish you continued success! You can do this. You are already doing it.