I don’t recall the specific variant, but I had cellulitis in my leg a few years ago. I busted the fire out of my shin getting out of the cab of a tractor; after a couple of days my shin was black and blue and I couldn’t even sit still without swearing like a sailor, so I got my mom to come pick me up and take me to my doctor (there was no way in hell I could’ve driven myself by that time). He looked at it and said it was probably just a bad bruise, but he recommended that I go over to Norman Regional’s ER where they had the equipment to make sure it wasn’t a blood clot.
They did an ultrasound and some testing, and it turned out that it was just a bad bruise and an infection. This very pleasant, nice sounding, yet undeniably evil woman in a nursing outfit shot me in the butt cheek with what felt like a turkey basting needle, then made me roll over so she could shoot me in the other butt cheek with that same evil needle. Then she gave me a prescription for a Z-pack (IIRC) and sent me home.
About a week later, I was good as new. Well, more or less.
I hope it works out as well for you, less the evil woman with the giant needle.
Oh yeah -- I got the turkey baster treatment in my ass, too ... But I only got one! Thank goodness! I dunno what was in that syringe but I'm pretty sure it was chemically in the same class as gasoline.