The Pfizer vaccine is going to be definitely approved in the US today, after half of the population have been vaccinated.
So basically the US has been vaccinating people with a vaccine that was NOT definitely approved.
Hello! Have you checked your jaw (TMJ), neck etc? Have you tried physiotherapy? Maybe there is a physical reason for your tinnitus.
If it is not due to loud sound, I think you have a better chance for recovery :-)