Weird rash combined with fever

So I’ve had a temp of 101 for the past five days, and within the past two days I’ve also started developing these weird rashes on my butt and down the backs of my legs. They look like this: https://imgur.com/a/rash-1SbWH2y?third_party=1 and kind of come and go, like will flare up and be insanely itchy and painful for around an hour and then kind of subside, but the bumps are still there, just smaller. I’ve also started kind of feeling like I’m losing circulation (or more like gaining it back, like when you come inside and your feet start to warm up and get itchy and painful) in my hands and feet, but when I look at them they look a bit red, so I’m wondering if it’s the rash presenting in a different way. I’m kind of wondering what could be causing this rash (side note: I’ve previously thought I might be allergic to my own sweat or something, because sometimes when I run my neck/face gets itchy and a little red, but I haven’t been sweating at all that I know of). Primary symptoms of the fever seem to be bad body aches and chills, to the point where i feel like I’m just so so cold. I’ve had an almost unnoticeable runny nose/sore throat. 19F, 5’5”, 120lbs, American and haven’t left the country in years if that matters.

UPDATE: I went to urgent care and got diagnosed with strep. The doctor seemed pretty surprised to see it come back positive, and also said that my rash isn’t really a strep rash. Any ideas on what the rash could actually be?