Call your doctor that prescribed the amoxicillin. I've had strep a few times and the strain you have may be resistant to amoxicillin so you may need a different antibiotic. That happened to me. Perhaps you can go to the doctor to confirm it is strep via a rapid strep test?

Susan

SCC R-Lateral tongue, T1N0M0
Age 47 at Dx, non-smoker, casual drinker, HPV-
Surgery: June 2005
RT: Feb-Apr 2006
HBOT: 45 in 2008; 30 in 2013; 30 in 2022 -> Total 105!
Recurrence/Surgeries: Jan & Apr 2010
Biopsy 2/2011: Moderate dysplasia
Surgery 4/2011: Mild dysplasia
Dental issues: 2013-2022 (ORN)