Wow, your symptoms and history are a reflection of my own struggle with these issues. Spirometry results: no evidence of copd or lung disease. Twice I have endured this months long problem. Never had this in Thailand (lived there for over 1 year). Perhaps environmental trigger causes existing thick mucus in the throat to take on a more sinister aspect. Methacholine spirometry ( plus complete PFT) my next lung test.
The "Rooster" mysteriously, after 6 years posting his weekly personal, social, political and often emotional, sarcastic, humorous and ranting diatribe has surfaced. Good to have you back. Be safe, be well. ✌️????