u/mountaingoatsarecold

I have been diagnosed with OCD since I was 15 and looking back on my life, a lot of it has been controlled by OCD. But recently I have just been I guess derealizing, like I am watching my life through a movie screen and I am able to see outside of the screen as a spectator. I have also been thinking that I am dead and that I am not actually here anymore and I am expericing things as a dead guy. What are these feelings and how do I get over them? If it helps I greened out about a month ago after smoking too much weed. Plesse help me.