Hi. About Two Months Ago I Started Having Moderate Night

Hi. About two months ago I started having moderate night sweats from my chest and neck. A little over a month ago I developed what appears to be a herald patch on my upper thigh, followed by the beginning of a rash/hives on my chest about three to four weeks after the herald patch developed. It has been two weeks since the rash developed and I still have it but it does not itch, only a little when I first lay down at night. I would like to know if it is just a fungal or bacterial infection or if it could be something more serious like cancer or HIV. I show NO other symptoms such as fever fatigue or confusion or anything of the sort. I'm curious if it could be psityriasis rosea as well.