Do pain under arm pits and in knee after sex indicate HIV?

Hello doctor,

I have potentially been exposed to HIV (Human Immunodeficiency Virus). 20 days back, I had protected sex with a sex worker and at some point during the intercourse the condom broke exposing my entire penis. I do not know how long this exposure took place. Three days later, I started experiencing a fever. The fever lasted up until a week approximately. I returned home and had swollen lymph nodes below my jaw on both sides. I went to my doctor the next day, and told her what happened and my worries, she prescribed me Doxycycline for the lymph nodes. Within a few days, the left lymph node had completely gone down but the right one still remains. The doctor also had me test for STDs (Sexually Transmitted Diseases) (syphils, gonorrhea, and HIV, all negative). I am now experiencing tenderness and slight pain under my arm pits and behind my left knee, there is a pain when I walk or stretch that leg. Are these the symptoms of early HIV infection? How worried should I be about the lymph nodes? I am also experiencing intermittent tingling in my feet and hands.

Thank you doctor,

After four weeks, will the DUO test be conclusive? Also, what could cause the tenderness under my arm and behind my knee?