You need a Doctor to give you that kind of advice. You can do this online in a chat session with a real doctor. As for the meth, don't be afraid to ask for some help. My DOC are opiates but I've done more than my share of meth. The longer I stayed away the less the cravings. At the time I couldn't imagine life without meth but I'm having a great time now without it.
A side effect of meth is increased heart rate and high blood pressure.
As long as you continue to use you will have high bp.
Could lead to heart attack or stroke.
Were you honest with your doctor about your meth use?