question: Hi i'm a social smoker and have just began to feel mild shortness of breath and very very slight pain in my chest. the breathing is hard when i lay down. it has got a little easier but still feels weird when i lay down. i smoked last night and this has just happened tonight. should i be worried? if i don't smoke will this go away? i used to have asthma could smoking have triggered this? could it be a mild panic attack i'm under some short term stress and am slightly in a depressed mood lately?