Hmmmm... Read this whole thread from the beginning, and I am kinda purplexed why some folks seem to be surprised by this kind of symptoms...
Changing levels of nicotine - up or down - can cause chest symptoms, light headedness, GI symptoms of all sorts. It's not at all uncommon among smokers who change how much they smoke or what they smoke - why should it not be the same for inhaling nicotine in vapor?
But, also, I would think that even though presumably vaping is better for us than smoking (and I am assuming it is, or I wouldn't be doing it), look, we are still inhaling foreign substances, and I'd be surprised if some people *didn't* have symptoms...
Plus the very physical act of vaping might be causing muscle discomfort, as someone pointed out.
I am not trying to make light of anyone's symptoms - honestly - and I am very sympathetic...
Heck, I'm enjoying it, I like it waaaay better than analogs (though I can't quite quit yet), but I've had heartburn, acid reflux, asthma attacks, chest pains, migraines, strange dreams, and a whole slew of symptoms. All of them related to either overdoing or underdoing nicotine, and getting used to inhaling something my lungs didn't what to have anything to do with. And another thing: analogs actually have dilators in them last time i checked - get off them, and you might very well end up with asthma symptoms for awhile, quite irrespective of vaping...
Just my two pennies. Hope i haven't offended anyone. Hope everyone with unpleasant side-effects feels better soon and checks with their doc just in case.
Cheers,
Briar.