When you say you've been ART - do you mean antiretroviral therapy? For HIV? Why?
And swabbed for what 4-5x for where?
Have you had a covid test?
Most oral STDs don't give you symptoms, and getting an oral STD from giving oral sex to a vagina is unlikely - possible, but not likely. If you haven't been tested for it, you might as well be. You probably won't rest easy until you are.
HIV from oral sex is NOT a risk. I'm not sure why you are on ART, if it's from this risk or if you already have HIV.
Lots of things cause sore throats - colds, flus, allergies, covid, etc. I'm not sure if this is what you keep getting swabbed, or something else. STDs are way down the list.