I'm so sorry to hear that your granddaughter now has a rash..I do hope it's not itchy, at least! My daughter broke out in a rash when she was around 12 years old. She was on amoxicillian when she broke out. I brought her to the doctor, and she was given a shot to determine if it was from an allergy to the meds. Amazing....her rash disappeared for a while while we were there, and it was indeed an allergy to the amoxicillan. Her rash then reappeared, confirming the allergy...my brother is also allergic to amoxicillan.
Now with regard to her fever...I'm guessing that's from her pneumonia? Poor kid! 🙏