Hi, Despite the beliefs about apparently benign nature of marijuana (cannabis) use, it is a dangerous addiction with a host of adverse effects like anxiety, panic reaction, anxiety, palpitations, increased symptoms of chronic bronchitis, such as coughing, production of sputum, and wheezing etc. As you have been a past smoker & self admitted heavy marijuana smoker; your problem most probably resembles acute exacerbation of bronchitis. Hence, I would sincerely advise you to immediately stop smoking marijuana as thankfully it can be stopped abruptly without any significant discomfort. Secondly consult a doctor for using mucolytics like mucinex, bronchodilator meds like terbutaline & steroids for controlling inflammation. Good luck