It started 2+ years ago on my birthday in a hotel in Austin TX. I
collapsed and had no idea what had hit me.

My Dr said I had a sinus infection gave me 5 days of Ketek and it
seemed that all was well.

A few weeks later it was back, with a vengence, did about 10 days of
Levaquinn, and it went away.

For the past 2 years and change now I have had a sinus infection every
3-6 weeks, I take antbiotics, it goes away for a while then comes back
twice as strong.

Ketek, Levaquinn, Cipro, Augmentin, Bactrim... had them all!

Had both a CT scan and MRI neither showed anything operable.

Went to infectious disease, they found nothing.
Went to a Dentist, he found  a few cavities, but nothing that should
be a factor in my sinus condition.
Went to a Chiropractor, again, straightened out my spine and neck, but
infection still present and causing illness.

Where do I turn now?