The only time I've experience a tightness in my chest was after vaping a little of a mix that contained PA Tangerine which is oil based. I haven't tried her VC but she might be using Capella's. I hope it isn't anything in VC that you are reacting too, that would be most unfortunate as it's such a great flavor, base, fixer upper, etc. She has advised her proprietary mix is over 50 per cent VG though, maybe it's even a little higher in some of her creamier flavors, was the VC a really thick liquid? Maybe that's what bothered you?
It doesn't appear to be any thicker that her other juices that I have. I sure don't want to give it up since it is SOO good
It could very well be something in the air this time of year. I have only been living in CT since April so it could be autumn allergies.