Hi, welcome to the forum, the most common cause for sinusitis is Deviated nasal septum (DNS). This condition leads to obstruction and breathing difficulty. This can lead to sinus infection, ear infection and headaches.
Other possibilities are laryngeal web, asthma, any structural abnormalities in the nasal passage such as nasal polyps, hypertrophied turbinates etc.
You need to undergo detailed examination of nose and radiography of the sinuses to rule out existing sinusitis.
The septoplasty or rhinoplasty for deviated nasal septum (DNS) will help you to relieve your symptoms. I suggest you to consult ENT surgeon for further management. Take care and regards.
Hi and welcome to the community.
Your symptoms are consistant with sinus infection or chronic sinusitis. You doctors should have picked up on this easily with a basic exam. You may want to see and Ear, Nose and Throat doctor for an acurate diagnosis. They do a more thorough sinus exam with scopes that may reveal something the other doctors are missing. He may order a sinus CT to see if something else is going on as well.
Take care and God bless.