Mayo Clinic Long COVID Appointment Reinfection Risk!?

Need some advice and thoughts. I have been suffering from long covid sinusitis for 6 months now. This is the second time it happened-also happened in 2022 and took 14 months to go away.

My aunt was able to get me an appointment at Mayo Clinic with their ENT center which is one of the best in the nation to evaluate me but I am terrified to go because of Covid or flu infection. Obviously I would wear my N95 but have to take it off to have my nose scoped. Here’s the thing I was already evaluated by an ENT and had a ct scan and scope 3 months ago and basically my sinuses are inflamed from Covid and palliative care was prescribed.

I live in Minnesota and my health insurance covers Mayo Clinic. What are your guys thoughts on going to he evaluated by the best weighed against the risk of reinfection which I know will set me back all my 6 months of progress and lead to horrific sinusitis.