I smoked weed basically everyday for the past two years and the heavily the past year and only cleaned my bong sporadically. I also vaped during that period. I have since stopped and I am two months clean but I have been coughing these black specks on a weekly basis. I have a doctors appointment scheduled for a check in on my lungs but I wanted to know from others who have experienced this or something similar if this is common on smokers or if I should be extra concerned. If you experienced this, what was the cause? Thank you.