On 4/26/09 I had an encounter with an escort. During this encounter we had protected vaginal and oral sex, however a couple of times, as a result of losing my erection, the condom I wore did not cover the lower region of my penis. I remember checking the condom for signs of breakage, and I am sure that it did not break. About a week ago, I noticed a somewhat painful lump under my left armpit. It was tender and slightly painful to the touch, and was about the size of a pea. Throughout the course of last week until today, two more similar lumps developed under my left armpit area. In addition, I discovered today a small, but not painful, lump on the neck, about an inch below my right earlobe. Although I have not experienced any other ARS symptoms such as rashes, fever, etc, I was wondering if I should be worried about the lymph nodes swelling in my armpit/neck areas as a result of ARS? Did I have a significant risk for contracting HIV based on the information I have given about my encounter back in April?