I had unprotected sex about 2 weeks ago and i've developed a rash made up red small itchy bumps on my back and a few on my feet. I'm scared it could be hiv rash but it is a bit too soon to get tested and get accurate results. The itchiness generally gets worse when i touch it and when the itch fades, the bumps turn into a purplish colour. Does the rash shown on the pictures resemble that of an hiv rash?