Thank you for the detailed post. You seem quite knowledgeable. I will try to give you the details.
I went to the Ram hospital a first time to see the eye doctor. After running tests, the doctor said that i had no glaucoma, and then advised me to see the throat doctor because she noticed i had a slight swelling and redness on the right cheek. The visit at the throat doctor was very quick, no endoscopy, he told me that i could get a CT scan if i wanted to. Unfortunately, my insurance at that time didn't cover the cost of it and since it was pretty expensive, I passed it on... I then looked for another ENT doctor, and got recommended a small clinic.
When i went to that doctor, at that point, i had mainly ear problems, not sinus problems yet, or very mild. He prescribed me Roxithromycin 150mg and a nose spray, Rhinocort (Budesonide). After that initial treatment, it was better, but the issues came back rather quickly. I then went for a second visit at that same doctor, more or less 1 month after the first one, and that time he suggested that my issue might be nose-related. I indeed noticed that might right nostril was clogged pretty much all the time but didn't worry much about it, as i experience regular allergies since i'm a kid, so i thought it would just go away as usual with antihistamine (which i take everyday ) But anyway, that time he did endoscopy. Which one, i'm not really sure so i don't want to take a guess, but i think it was a metal tube one. He said i had no tumor or anything related but saw an inflammation. He looked in both my nostrils and told me i had a slightly deviated septum in my left nostril, but my issue is only the right nostril. He also said i might have an inflated membrane (for a lack of better word since i'm not a specialist) deeper in my right nostril which may cause the issue. He prescribed me the same treatment as before, but this time i took the 300mg antibiotic. I then went for a 3rd follow-up visit at that same doctor, but he couldn't really tell me more than what he already told me. Upon my request he did an endoscopy again and saw that yes, i had some inflammation in the nose and ear. He said 'oh yes that disease can come and go' and mentioned doing surgery which I honestly don't think it would solve the problem and i don't wanna go down that route....
My ear problems went away, but my nostril problems intensified accompanied by a frontal mild pain, which varies from day to day.
I then begin to look for alternate solutions, like inhalations and sprays. Upon reading this forum, people were advising against those 'Thai' sprays found in pharmacies and mentioned Flixonase or Beconase (which i use to take back in Belgium when i was younger). But apparently, you cannot find them in Thailand. Now, i don't use any sprays as i don't want to depend on them and create further complications.
I also saw some people mentioning Ephedra, which is a Chinese medicine, apparently.
You mention biofilms, but i'm not sure what are they?