Recovering Methamphetamine Addiction, Feeling Tired?

Bassically im trying to stay clean off of Methamphetamine. I first started taking Meth to help me stay slim. But now I just constantly feel terrible and extreamly tired when im not on the drug. I don't feel like I can funtion right. I feel incredibly sleepy constantly.

What can I do to change this besides doing the drug?

: http://alcoholdrugstreatment.info/recovering-methamphetamine-addiction-feeling-tired