I had experienced headaches,combined with weakness and sore throat. I did develop a rash on my chest, though it looked like a pimple(it was a single rash). These symptoms appeared 2 weeks after unsafe sex,and went the next day after I had ant-biotic. Could this be a case of acute HIV. How long do these symptoms last? For me the symptoms went within a day. Could someone also tell me what does the rash appear like, I might have confused my rash with a pimple. Its been 11 months since I had unsafe sex and I have not got myself tested, Could someone plz clear my doubt.