I'll tell you this, cannabis psychosis is extremely possible. I suffered from it for 6 months. It usually comes after your first long session of smoking (more than a few months) that you partake in. You get so lost in your thoughts that are caused by the marijuana, that you slowly begin layering on a number of mental disorders. Paranoia, derealization, depersonalization, depression, anxiety are all caused by YOU, and the way you're letting your mind get warped.

I cured my "Cannabis psychosis" by taking a 6-month break from marijuana, then smoking again and basically going into my brain and reorganizing the way I think. When I first smoked, I walked around this club and realized that I was a very special person compared to these people. That knocked off the low self esteem layer I packed on through my first period of smoking. I smoked again at my house a few days later, and knocked off another layer. and I kept on every few days, basically realigning my thinking pattern and getting it back to a positive state of mind. It works!

From now on when you smoke, remember not to let yourself get lost. Make sure to tell yourself that you're high and be yourself. Don't lose it.