I don't know whats going on but sometimes I get a heavy chest after smoking my ecig. Even when I quit smoking my e-cig, i still have heavy breathing all the time... I just quit ciggerettes yesturday btw i am smoking 12-18mg. Feels like its hard to breathe like an elephant is sitting on your chest. I think it might be partially anxiety from laying down the cigs yesturday. But IMO i think it is from smoking too much nicotine and then i can't hardly breathe. I want to vape so bad, I don't want to smoke regular ciggerettes. That is why I quit smoking regular ciggerettes because I thought it would make me breathe better. I started feeling heavy chested and couldn't breathe that good smoking ciggerettes so I thought making the switch would help. Is this a matter of anxiety or too much nicotine. Or is it something else? My juices are pretty good grade i suppose?(Overstock e-cigs and more), I have heard good reviews on them.. they have pg and vg in them but I don't know the percentage values... I am smoking only in between 10-18 mgs at most. because I have 4 different juices mixed (1-0mg, 2-18 mg, 1-12 mg...I have a little bit of each mixed...) so I mean I don't have a perfect number but they can't go over 18mg if the highest is 18mg right? I definately need some support here.