Need some advice / help

I’ve been watching porn since I was 12 I’m now 18 and recently I haven’t been able to get hard while watching porn and if I do it’s semi not full throbbing like I used to so I googled and found out maybe I have ‘PIED’ ( porn induced erectile dysfunction) and that when I started feeling I had an addiction I watch porn at least 20 times a day everyday it’s all I have to do and for the last 4 days I’ve tried to stop watching porn but I just relapse and the tell myself “alright now I’m serious” then I relapse again but I really do want to stop because it’s eating my life. So any methods or some self talk stuff

Thanks