I am a nurse too. I pretty much have the same story as you except I was confronted early on but still went through cold turkey terrible withdrawls on my own. Went through treatment and am almost to 7 months sober. My license is currently suspended and am jumping through the same hoops to hopefully get it back in about a year.
I was a good nurse too but man did I like that drug after the first time of using it. It became an obsession with me. Searching, sneeking, using, learning, watching....an everyday cycle.
Now I go to meetings and try everyday to stay away from the crap that fills my head. I am cleaning up my life and back to being a happier person than I was 8 months ago.