Lately I have had really painful soars in my mouth and my lips are constantly chapped. I'm wondering if vaping would cause this or is it just a coincidence? This soar in my mouth is REALLY painful!! Any ideas or suggestions would be appreciated.
As you note, we ain't doctors (well, not most of us at least?). But...
Quitting smoking by ANY method does have its own "side effects". Tobacco smoke has 4,000+ chemicals in it, some of are actual, outright poisons (cyanide for instance!).
There's some good reasons to suspect that the smoke kills bacteria (etc) that were already present and slows them down. "Masking" problems you already had but we're developing slowly. Removing those regular doses of poison can let the critters "take off" and the existing issue emerges.
One I see talked about a lot and went through myself involves tooth pain. The vaping doesn't "cause" it so much as the smoking slowed it and masked it. When you stop smoking, blood flow to the mouth returns to normal and things can get wonky. In my case, it was an old root canal that went nuts. Thought I was headed for the dentist but then it calmed down.
I'd say give it some time. Unless it just keeps getting worse or is intolerable. Then, yeah, get to a doctor. But it can actually be a really annoying sign your body is trying to recover now that you've stopped inhaling toxic smoke.