I have potentially been exposed to HIV. In Brazil, on December 9 I had protected sex w/ a prostitute 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, December 12, I started experiencing a fever. The fever lasted up until Dec 15th approximately. I returned home, United States, on the 14th and had swollen lymph nodes below my jaw on both sides. I went to my doctor the next day, Dec 15th, and told her what happen and my worries, she prescribed me doxycycline for the lymph nodes. By Sunday the left lymph had completely gone down but the right one still remains. The doctor also had me test for STDs on the 18th (Syp-Neg Gon-Neg, and HIV-Neg.) 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 the symptoms of early HIV infection? How worried should I be about the lymph nodes?