Interestingly, it may not even be related to vaping.
I heartily endorse seeing your doctor. I'll tell you why.
It could be food related and / or the former smoking you did.
You need to get an endoscopy.
People often have reflux and GERD symptoms that do not manifest as heartburn. Some people think they have post nasal drip, other people have heartburn, others think it's in their chest but it's actually in their esophagus.
I do NOT agree with the person who said the doctor will tell you to stop vaping. There isn't too much I don't know about GERD/reflux, and my doctor wanted me to stop smoking. He said no matter what, vaping would not be as bad. I also had to go on a very special diet and not eat foods that irritated the tract from my mouth all the way down to stomach. You'd be suprised what foods can do --- and now ejuice, some people do get stomach upsets from it. What I'm saying is that GERD manifests as stomache and chest pains and weird throat things as well. (several times, I had symptoms like I was having a mild heart attack in my chest, so of course I thought it was my chest or heart, and it wasn't.

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I'm quite sure your doc will want you to have an upper GI and then probably an endoscopy. Neither test is painful in any way, they will put you in a "twilight" sleep for the latter.
Everyone should be scoped if they have ever smoked anyway.
if it turns out you have upper GI problems, they would be exascerbated by just about.......anything. Food or vaping. That's what Nexium, the little purple pill is for.

Millions of people are on these proton pump inhibitors, which is what they are, and they not only relieve symptoms but also "heal" the tract over time.
As for the list of things in either your juice or your equipment, it could be a number of things. The PG, the VG, the Flavorings in the juice. It could also be the wicks in tanks and clearos. I pretty much can't vape with anything w/a wick, I may have a sensitivity to silica.
This is a problem since I hate cartos, I can sort of taste the filler, but I can do tht better than wicks. I solved the whole problem by just getting bottom feeder with an atty, so no wicks OR filler anymore.
