I honestly feel I wrote this myself. I have the exacts same thing. At the start it would come and go, but now its just always there. Its been a good 12 years. When I drink alcohol even just 1 drink it instantly feels better to the point I can even smoke, but the next day it comes back so much worse. For the last 2 or so years I have completely stopped drinking alcohol and smoking coggarets, but its still there all of the time. I have to be uo for work in 4 hours but am unable to sleep as I keep feeling like I'm running out of breath and need to take a deep breath for that relief that only lasts a few seconds. I hate it so much 🙁 I can't believe nobody jas figured out what it could be yet. I hope you're better