EDIT: Please delete. Massively appreciate the help received and took it onboard, although would prefer to just get rid of the thread & move on with the help suggested. Don't particularly want any reminders of who I was lying around.
In a word, “Yes” Stop watching porn. Stop masturbating for while. Work on your relationship with your woman. Respectfully, It appears you have an addiction.
My opinion is if you think it's a problem, it probably is. Porn is a slippery slope that you should limit and try to simply concentrate on your feelings when you masturbate. Porn gives everyone such unreal expectation on what sex should be and how people should look and act and all.
We are an older couple and only watch porn maybe 2-3 times a year. We enjoy it when we do, but we have a great sex life together
Plus, after a while, it's pretty much all the same, especially the 'professional' stuff. I'd limit yourself to the amateurs so at least it's real people. One way I've found that helps is to do it in the morning so you're not thinking about it all day and can actually concentrate!