I found this forum, because of this thread. The same thing has happened to me.
I had a dull pain on my right side, it wasn't horrible. On a scale for 1-10, with 1 being absolutely no pain, and 10 being the worst pain in my life, it was a 2, maybe a 3 sometimes. Fairly easy to ignore.
Except it didn't go away.
I told my primary care doctor, who did some bloodwork and an ultrasound. My liver enzymes were elevated, and he asked me about my alcohol drinking. I do drink, just not much, maybe a few times a month, mostly wine, and the occasional beer. So, I'm not a teetotaler, nor am I a lush.
I suspected vaping, as that was my only other vice. So I searched around on google, and found this and a couple of other old threads elsewhere on the this very same topic. ...So I quit vaping.
Luckily I didn't go back to smoking since I've been vaping a few years now, and had absolutely no desire to pick up that lethal habit again. I used a tank and box mod, for those of you who find this post and are curious. I typically vaped high VG juice, with a nicotine level of 3%. ...for those who might be curious.
After about a week the pain went away.
I really enjoyed vaping, and hate like hell I can't do it anymore. But that was scary.