Do you mind me asking how you've landed on amoxicillin? I ask because choosing the wrong antibiotic can make an infection much worse.
If you saw a doctor and he or she suggested it after a culture or visual inspection, cool. If not, I could hypothetically know a guy who has a medical degree who happens to always be sitting at my computer with me, and might be able to ask a few questions to make sure.
I also have a source that carries ABX and has a TA time of about 2 days.
Please reply soon so we can get this taken care of.