One time I shall disagree with Jean
Vaping not good but it is not nearly as bad as smoking. nebulizer almost feels the same as vaping IMO. There is a study I can pull up but the point is you do have copd now so simple things like dust, pollen a whiff of camp fire smoke are going to affect you differently than a person with healthy lungs.
IMO you had a huge success quitting smoking and have moved over to vaping. Now the next step is to slowly stop inhaling the vape STEAM (which is not smoke) and only inhale to your mouth. What you have to slowly work your way from is the nicotine now. Your still going to get nicotine through your saliva. So slowly work your way down from that. I personally got down to 3 mils nic and now only seem to vape when I get ard my one buddy I see once a week who I convinced to vape.
Look at vaping as a solution you don't have to depend on the rest of your life, unlike a lot of medications out there. Vaping has the best success rate for people to quit smoking and I think its legacy media who gives it a bad rap (whose paying them)
Common sense IMO, clean fresh water turned to steam should not hurt you as long as there's nothing bad in it . There's no such thing as clean smoke. Propylene glycol, vegetable glycerin, nicotine are the main things in vapes. You can find this stuff in everyday consumer products except the nicotine which has its own story of other uses they use it for now. The biggest problem is what they use to add flavours, that's where the biggest toxins can come into play.

So stop inhaling and work your self off the vaping over time, you have copd now

Don't forget deodorant and air freshers are irritants too

Vaping is as bad as smoking. That's why you don't feel good. Quit vaping. If you continue, everything I'm going to type here is wasted effort. Try to find a health professional who is skilled at helping people quit smoking. They have lots of options and will help you find something that will soothe every trigger you have for smoking or vaping. Find a good support group and have the help-quit number on speed-dial. Use both of them as life-lines. You can give this addiction up, but you really need to want to give it up. If you know in the back of your mind that you really don't want to quit, don't bother. Just know that things will continue to get worse, and death by nicotine takes a long time and is never easy or pretty.

Sorry to be so blunt, but I think you deserve to know the truth.