Ron,

My concern is not about your drug use. I am more concerned about your sparring. What kind of sparring do you do ? How often have you had jars to your head of any kind, with head gear/helmet or without ?

You should consider looking for a new social group. 18 does not predispose you to social groups that do grass and drugs.

btw, How much marijuana and other abuse of you brain have you done over the past decade ? Did you drink to get smashed ? This question is about brain health, not behaviors.

Check out the Vitamins thread. It will help your brain purge the many toxins. It will take months of good discipline to clear your brain so it can try to heal. You have 90% of your adult life ahead. Getting a handle on brain health now will give you many benefits.