Let me quote from http://fuckcombustion.co...or-hayfever-relief.9887/

"Cut open a Nettle tea bag - filled the Puffit's bowl and set it at number 5 (about 180C/355F)
Went from sneezy to breathing free with the second exhale"

The above might not be entirely true, but right now nettles are one of your closest friends. I would try vaping them and drinking tea too. See if anything happens or changes.

I have had trouble with bronchitis and the problem with this particular phenomenon is it will haunt you. I have had bronchitis when I was a child and now around 18 years later it came back when I gave it the slightest chance.

Stay safe

Have you tried oral cannabis? Cannabis is a powerfull broncholidator. It could maybe help you breathe more freely. Cannabis also amplifies the effects of all classic hallucinogens. This means that you could achieve psychedelic states with smaller amounts of shrooms or LSD.