u/cuteaskittens420

Prescribed amoxicillin-clav for a pretty nasty tonsil infection/possible abscess. 24 hours later and I have this nasty - burning canker sore. I have a low-grade fever/ semi normal temp of 99.9 F. I still feel super lethargic. Is this a normal side effect of amoxicillin? Or is this a sign the infection is getting worse? I am also still having pain, taking cough syrup helps, and ibuprofen in between. I was told to go to the ER if it seems like it’s worsening. But I don’t want to go if this is a common side effect of this antibiotic. Thoughts?
Older pics on my page, what it looked like before antibiotic treatment.

Got prescribed amoxicillin for a tonsillar infection and possible abscess. I have now developed a pretty bad canker sore on my tonsil. I have a temperature of 99.9, and very lethargic. Is this normal after 24 hours of amoxicillin? Or is this a sign that the infection is actually worsening? Told to go to ER if the infection seems worse than before. I am still experiencing some pain, like I swallowed a handful of thumb tacks 🫩
Pic of tonsils in post, also older pics on page from before being diagnosed and given antibiotics.

Went to urgent care yesterday and got tested for strep which came back negative. They did also do a culture but that won’t come back for 2-3 days. Doctor said it “might” be a tonsillar abscess and sent me home telling me to come back if it gets worse. I woke up with a 100.13° fever. I also have mild pain in my neck and ear on the same side. I cannot afford a 100$ copay again today, so I’m wondering how serious this could be? Will it go away on its own? I wish she had just prescribed me antibiotics since it’s an obvious infection with exudate oozing out of my tonsil. It is only 1 of my tonsils