I used to smoke alot but have been on and off these past few months. Recently, I ve been smoking again but only one every once in awhile. I smoked one earlier today and a few minutes later I felt sick to my stomach, light headed, tightness in my chest, neck pains (I have enlarged painful lympth nodes) heart was between racing and then beating very slowly and then shortness of breath. I wanted to pass out but I managed to throw up a bit instead (which did not help). I only smoke one only once in a while maybe one every week or so but every time I get these symptoms and it s getting worse?