A bit confused

Hello everyone, it's amazing to be here and watch how supportive everyone is.
I'm here mainly for religious reasons (no explanation needed LOL), however, i also suffer from premature ejaculation.
To be honest with you, my case is pretty severe, whether i masturbate or have literally any kind of sex with my wife, it never takes me more than 20 or 30 seconds of stimulation to ejaculate, and I've tried everything to control this (except for drugs) and nothing worked.
As you would expect, this is affecting me greatly and it's a major embarrassment even if I'm completely alone.
I was very much addicted to porn, I would do the deed 1 - 3 times per day, yet I have stopped watching that filth 17 days ago. What I really hope to stop, is masturbation.
My question to you guys: Is porn the reason for all of this or is it masturbation or both? And did anyone manage to reverse the whole PME problem after quitting either?
Thank you, and stay awesome!