I have read up on hiv but the information is so conflicting to the point it makes me have anxiety
You can't get hiv when you use a condom. Micro tears are a myth so it didn't fail. All of your tests were a waste of time so they will always give you a negative result. Further testing will be abnormal.
hiv can't be diagnosed from symptoms, so you should stop trying to look for any body connection to self diagnose hiv. Either your body was always like this and you never took note, or else you should see doc if concerned, but continuing to study hiv is just wasting your time.
So, you did not need to test the first time or any times after for HIV. You had zero risk. The sex was protected and that is NOT a risk for HIV. HIV is only transmitted by unprotected vaginal or anal sex and sharing IV drug needles. So, there is no way you could have HIV from your sexual encounter. Don't test again. You'll just be feeding needless anxiety. Antibiotics can lead to gi issues including loose stools. They kill the natural 'good' bacteria that helps us stay regulated. One way to replenish it is to take a good probiotic. This restores gut flora. But HIV is not an issue or fear with your exposure.