I havent gotten tested yet and i rhink that its now four years and symtoms begin to appear and this seems to be the obvious one
The only risks for HIV in adults are:
1) Having unprotected anal or vaginal sex, or
2) sharing intravenous needles with IV drug users.
There isn't any other situation that you can think of, including the ones that you mentioned, that would put you at risk for HIV. Stop trying to diagnose your own mouth symptoms and see a doctor to determine the cause of your non-HIV related issues.