5 weeks and a few days post exposure I had a very temporary flat, red, blotchy rash on the top of my left shoulder. It lasted for maybe a few hours. I played golf that day and it was scorching hot and humid, so I thought it was a heat rash. However, heat rash appears to be a red, pimple like raised rash. No fever or other symptoms with my rash. (1) does this sound like HIV rash since it was so short in duration, (2) is over 5 weeks too late to get rash sympyoms...everything I've read says w - 4 weeks and (3) what else could this have been? Thanks for any help.