Yes, it sounds to me like switching to vaping may not resolve all of your symptoms, but it may help some of them, especially if you can get your nicotine levels down to a reasonable amount (I'm not sure I'd worry about that as much while you are transitioning to vaping stably) and stay there, hopefully.
Have you talked to your medical practitioner about this he/she may have suggestions, e.g. if nicotine relaxes the sphincter in your stomach you may need to not vape near bedtime where you will be lying down (even if propped up) type of thing. I'd talk to your doctor more about it if you haven't.
The other thing you could do is vape unflavored, for a while. Then slowly add in simple flavors (by then, you may be ready for DIY, which, with one flavor profile is not very hard at all especially if you are already vaping unflavored) and see how your body reacts to them. I would probably do that if I were in your situation, to rule out allergies and sensitivities and then build a set of DIY flavorings that you can handle. For now, you can buy unflavored e-juice premade online if you aren't comfortable handling Nic, PG and VG.
Best of luck, I hope this works out for you and that you are able to get some resolution of your symptoms.
Anna