Symptoms if one gets them lasts 1-2 weeks. So just a day or 2 is not even close. But even if it last 1 week, still more likely that it was something else.
Armpit has nothing to do with HIV
"Flu-like" symptoms do not include gastrointestinal issues like you describe. Many people erroneously use the term "flu" to describe a stomach virus, which is incorrect. Influenza is the flu, not a stomach virus or a cold.
Your symptoms were not similar to HIV (ARS) symptoms in any way. IF a person who is newly infected experiences ARS, the most common symptoms are a HIGH fever (over 101-102), body aches, night sweats, swollen lymph nodes in several locations, and a rash. The symptoms are severe and will usually have a person out of commission for at least a week.
The reason we don't put any stock in HIV symptoms is because they are not a reliable indicator, many newly infected people do not have even one symptom, while people who THINK they were infected have textbook symptoms, yet end up testing negative. Plus, the symptoms are very commonly seen in other, very common viruses and illnesses.
The only way to determine one's HIV status is to test. A conclusive result can be obtained at 3 months post exposure. You had a risk, from the unoprotected vaginal sex, and oral is not a risk.
Thank you for your response nursegirl6572.