you had PROTECTED SEX...move on!!!!!!!
HIV is diagnosed through a blood test, not through signs and symptoms.
If you have had unproetcted sexual intercourse, you can go for a HIV test earliest 1 month after exposure and retest at the 3rd month for a conclusive result.
Was the sex unprotected or not? Never trust symptoms, they mostly mean nothing as symptoms of HIV can be confused with tons of other illnesses.
I also noticed two swollen lymph nodes at front left of my neck, only palpable but not visible without straining.