Is It A Bad Idea To Be Snorting Maybe 3

Is it a bad idea to be snorting maybe 3 very small lines a day of meth when i do have an overactive thyroid heard my doctor say graves a couple times too. Ive recently starting thinking about the effects of meth, racing heart an getting really hot an thats pretty much the same thing my overactive thyroid causes only difference is the meth gives me actual feel good energy which is why i turned to it. Im not addicted an only do it in morning before work to be awake. My question is with doing it an having this thyroid problem, am i over doing it an soon going to have a heart attack?