There is an oral rinse and gargle "test" for
HPV but it's not fool proof. For one thing
HPV concentrates itself in the far back part of ones throat and most people can't gargle back that far so one may not even reach the
HPV to be picked up in the sample even if they currently have it. One would also have to currently have the virus and we do know that one acquires and clears
HPV constantly throughout their sexual life so you may be in between infections.
EVEN if you were to have
HPV in your oral cavity the chances of it causing oral cancer are very remote.
I would get the Gardasil vaccination and get on with the rest of your life.