Your risk is very low. It's unlikely that your partner was HIV positive, moreover, it's relatively difficult to contract the virus from such a brief exposure, assuming if your partner was HIV positive.
As suggested by CurfewX just take a Duo test at 28 days from the date of your exposure and move on. I foresee a negative.
If you have tonsil infections it may be bacterial.
If she has an active sex life, she may have some bacterial infection as like chlamidia or gonorrhea. Unfourtunately, they are so common bacterial infections.
If you give her an unprotected oral sex, those pathogens may infect your tonsils. You can have a throat swab test to be sure.
White patches on your tonsils after 6 days wouldn't have anything to do with HIV. You can get tested with a 4th generation test to know your status after 28 days.
You might want to ask about STDs from giving oral in the STDs community: https://
www.medhelp.org/forums/STDs---STIs/show/98
Also, I forgot to mention that I have periodontal disease in my mouth but not any bleeding unless I brush roughly, I immediately went to the bathroom after performing oral on her and washed my mouth out with toothpaste twice but still have these patches on my tonsils with no pain...yet