I had RAI in early April and went hypo about 3 months later.
A couple of weeks ago I had a summer cold which has turned into a sinus infection. I am now on antibiotics for 10 days. I have sometimes felt dizzy and woozy (especially after getting up in the morning) but attribute that to my congestion and it backing up in my ears.
It could be coincidence – how are you sinuses and ears doing? If you have allergies it be that! Otherwise I’d be interested in knowing whether being hypo is making it worse.