Hi, I engaged in unprotected sex with a woman in early april, I do not know her Hiv status however. I just recently found a small bump under my armpit, i went to the doctor and they said it was 3mmx3mm and it was just a small infection and should go away by itself. i have read that swollen lymph nodes are common in ARS though, i was wondering if this sounds like a swollen lymph node or what it is. I have also been feeling a sore lower back, it may because I lift boxes all the time at work but I am wondering if it is common or a indication that I may have HIV. also when do ARS symptoms occur mostly and what are the most common ones. I havent had any other symptoms of ARS and its been a few months since I had unprotected sex with her. i am concerned and worrying about this lately and just looking for an answer by a qualified DR. thanks in advanced for your input.