Well a lot of what you are experiencing may be attributed simply from your body going through detox from not smoking. Throw in changing over to vape, and trying to find ones preferred juice blends, ratios, nic levels, and yeah, body going into mass overdrive, healing adapting, confused by long dead nerve/sense inputs, long thought inactive......
Just a lot going on right now so a concise diagnosis is not vape possible.

Some people will be intolerant or allergic to vaping high PG or high VG ratio juices. Personally found High PG juice to harsh, found 70-80% VG to be "my preference". And only by changing it up can one determine which is theirs. This I feel is one of the most frustrating thing about vaping, from a new vapers perspective, but quickly becomes a nonissue once resolved
Everything from oral, digestive, respiratory, circulatory.... every major bodily system designed to keep a human functional and running, is going through a major makeover right now, so best advice is, listen to your body, and follow it's instructions.
Hey say WHAT???
get laid get fraked feeling light headed a woozey, cut down the nic level, too much nic. Feeling stressed and irritable? umm nic level to low, you are jonesing for a smoke. bump up nic level by 5 mg, give that a try.
Irritation in throat, feeling harshness in vape? Well, what's your VG/PG ratio??? 35/65? change it to 50/50, still not right, go to 80/20, whoa, that's ain't it, woops wrong guess, go to 20/80. Some where along the way one is sure to find Vape Minerva. Least I did

and that's all that really matters.
Once one is Intune to listening to their body, then it's time to listen to what one vape is trying to tell them. By noticing the subtle changes in ones vape, they can quickly diagnose the problem. Dry burn flavor, wicking or setting issue, or running out of juice and time to refill. Everything effects everything in vape, and the longer ones vapes, the better vape gets.
I smoked for 30 years, now a vaper for over one year. Body has stabilized and improved, all issues, health and vape, have been resolved, and quite frankly, life has never been so good or something like that
Vape long and Prosper.!!!!