So start with the easiest solution... get an inhaler.
Your GP will want to listen to your chest...for rales etc. before giving an albuterol inhaler.

I have some episodes of swelling in the throat from my HAE...and at those times I breathe strangely and loudly. But that is a rare condition I have, so I just do calming exercises and that helps.
Humidity I agree is awful for me too. But I always carry an inhaler... bus exhaust and fireplace smoke, and ammonia give me asthma attacks.

You could have a mixed condition too.