It was about 2 to 3 years before I started to come out the other side. I suppose I worked on changing my perception of my own thoughts, the paranoia was a killer but I came to the conclusion that if it was going to happen there was nothing I could do to stop it so why worry in the mean time , it seemed to work for me and stopped my mind working overtime all the time. What you need to remember is if part of you gets ill its effectiveness will suffer, if you break a leg it won't support you weight, if you get a chest infection your lungs will not work so good. If there is something wrong with your brain ie chemical imbalance then your thoughts will not work properly, if you can understand why you think what you do and start accepting what you have no control over it will get better, but what worked for me may not for you, if ther is anyone you trust away from your drug friends see if you can talk to them, also go to your gp and tell him,her how you feel, good luck and stay strong you my not be able to believe it but with the right help it will get easyer