I have found out in anatomy that Sometimes drugs are to blame for imbalances of the brain, however, they are not always the cause.  for instance, thc can sometimes put someone into a paranoid state that they cannot shake.Then they have to take antipsycotics to shake it. Even if they have smoked tch several times before. Meth is worse than thc because it messes with the brain more intensly. IT IS NOT YOUR FAULT and stress and other factors sometimes cause schiz to start with its symptoms. Some people self medicate because they are embarrased to admit so they try to hide symptoms because of the stigma related to the diagnosis. Good luck and God Bless you