I used meth very heavy for five years. Only snorted. It messed me up beyond description. It is an evil drug. The fact you are bi polar and using meth is a bad mix. When I stopped using meth and got clean and sober I got meth induced post acute withdrawal syndrome. they didn't know much about it then. (1995) I had a full blown manic episode with major psychosis that lasted over a year. I am not bi polar I. It was all caused by meth use. Some people never get back to normal. I would strongly suggest you get back to meetings and your mental health treatment.