Trying to find help for sex addiction in Norway

Dear all, I am a sex addict.

I am a student from Norway, living in the capital, and for as long as I can remember I've been watching porn. Steadily this became a habit, and now an addiction. It wasn't until I turned 18 that I started visiting prostitutes. This was also at the time I met my first (and till now only) girlfriend. While I was with her I would frequent prostitutes, for what reason? I am not really sure.
Fast forwarding, I still visit the prostitutes. Just this last month I blew off a lot of money on the most ever visits I've ever made in a month. I really need help, but NoFap has not been enough sometimes to keep me away from this addiction. I would love to visit a professional, but I don't know where to start. Is there anybody here that can help me?