I had back pain,chest pain, headaches and mucus that just didn't stop (sorry for the visuals) after I quit smoking. And it wasn't immediate, almost two weeks in. I blamed it on a possible switch to PG or that I was vaping too much and a number of other reasons that, thankfully, didn't pan out as the reason was squarely due to not smoking. Remember, there are chemicals in analogs that work to numb your throat and passages to the effect of the smoke and other carcinogens entering your body. Quit smoking, the body starts to recuperate and goes on an auto-detox program to fix itself. It will also mean that vaping and the dehydration effects of vapor will be much more pronounced as your body has no way to numb itself as it would with analogs. After week 3, I was back to vaping fine and most of my symptoms had started to dissipate. You will need to drink PLENTY of water, you might even think it excessive, but listen to your body and give it what it needs. If a break from vaping is necessary, do that, too. The whole point of vaping is getting healthier, by doing something that is better (though, not best) for you than smoking and there'll be some pain to it, but I promise short lived.
All that said, the usual disclaimer (and an important one) still applies: check with your doctor and don't take chances with your health. We're all here to help you make this transition - congrats on making the switch and best of luck!
