As the others have stated, protected vaginal or anal sex is not a risk for acquiring HIV. Only unprotected vaginal or anal or sharing IV drug needles. Oral sex is never a risk. So, you are all good and have no reason to worry or test. You didn't have a risk at all.
1.Unprotected vaginal/anal sex
2. Mother to child transmission(rare nowadays though due to advent of PMCT drugs)
3. Sharing contaminated needles or syringes
If you had no exposure to above move on buddy. You had no HIV risk. Zilch. Enjoy life.
Using condoms prevents the spread of HIV. You had no risk.
Redness turns out to be result of my dry skin that I turn out to scratch a lot when sleeping and it turns out I had such thing on my neck a few days prior so I guess it’s unrelated :p But still I’d love to hear your opinion bout the main question
I also just noticed I have a red area under my armpit. Red and little dry. Is it the hiv related rash? So soon? What could it be? Should I go to the doctor? I am in a different country now. And I don’t know the local language.