sorry for the delay in responding, im getting a lump of fat removed from the back of my head. Ive smoked tabaco and weed for 20+ years, you think stopping for 3days is going to make a difference? anyways my wife is a rn so im going to stop anyways otherwise i will never hear the end of it. thanks for your info i will do the breathing excersizes and maybe quit smoking because of all this. cheers