A thought for you - Fungal sinusitis is an uncommon infection that was traditionally associated with immunocompromise but which is increasingly seen among the immunocompetent patient population. It is also associated with diabetes. Recently, there have been suggestions that it is actually very prevalent, occurring in most cases of chronic sinusitis - this assertion remains highly debated. The most common culprits are the Aspergillus and Mucor species.
You mentioned possible neurological issues - have you seen a neurologist for a medical screening exam?
I am sorry to read of your difficulties and hope you find an answer and treatment soon.
and Heart/Cardiovascular Disease. "She Stood in the Storm & When the Wind Did Not Blow Her Away, She Adjusted Her Sails."