hi i want to know why i am hacking up black stuff. now im not going to lie i have been using meth for over ten years and the last 7 yrs i have been using everyday i will smoke in the morning afternoon and night like a gram a day i know im addicted and i do need help but for now do you think this could be the problem because i dont smoke cig. or weed just meth i do work as a dental assistant and a cosmetologist and study martial arts, i am an active addict but you would never know i did meth i eat my 3 meals and sleep at night.so what could it be scared to go to the doctors....