I'm sorry to hear that. It's an addiction like many others. I don't think porn is such a problem unless it interferes with your life negatively which feeling guilty does and also I bet you do not have sex with your wife as often as you would if you were not addicted to porn.
I may think what I have to say is useless to your situation but I'll tell you what made me stop watching porn so much. I still will once in a while but I don't feel guilty about it or that it's out of control.
So I had watched porn regularly for years. It was pretty easy for it to not cause problems since me and my wife pretty much has sex on weekends and not through the week so Monday-Friday were candidates if I wanted to watch. Well due to unrelated (I think) problems like keeping secrets, living semi separate lives, etc our marriage was starting to weaken. Anyway I did a lot of research about how to get that in-love feeling back in a relationship. One of the best things I found was
The Love Bank . Anyway we opened up, learned a lot about things we were not doing and sure enough it helped. I do better at giving her what she needs and she is now pretty much ready for lovin any time I am. I really have had no desire to look at porn lately and by lately I only mean for the last couple of months. But I do definitely still like to watch a movie with my wife but just not by myself.
Like I said this may be useless information to you but the bottom line is I want to have sex with my wife now and I do not want to watch porn by myself and she wants to please me now and this is all because we figured out how to make our relationship more intimate. I hope this last forever because it's head and shoulders better what we had before which was actually pretty good even then.