i feal the same as you except it hurts when i breathe in from time to time.... and i have problems breathing at times like i have to fight for a full breathe of air... i wanna get a vapo real soon.... but if i do have cancer its not from weed its from the tabacco smoking..... but i prob just worry more than i should... because i smoked pretty heavily for past 6 years but can cancer even develop that fast? not sure but once i saw an add for donatings to this 3 yr old girl who got lung cancer from second hand smoke from her parents... also i think 90 percent of lung related deaths are due to radio activity in tabacco not the tar and ive never heard of weed actually giving some one cancer