Hello and hope you are doing well.
Agree with the above suggestion that taking a random antibiotic will not help with any infection. The commonest pathogen (agent) causing throat infections is a group A Streptococcus bacteria. Besides this Group B Streptococcus, mycoplasma, neisseria and cornybacterium are known to cause throat infections. Other known pathogens causing infections of the throat are viral and yeast (candida). The antibiotic of choice for a streptococcal infection is penicillin but azithromycin is also effective.
Hope this helped and do keep us posted.
You don't know if the infection is viral or bacterial, and if bacterial what organism is the cause. I suspect you have a few capsules of amoxillan around and taking a "few" is the absolute positive worst course of action to take. You will end up (if the infection is bacterial) with an infection resistant to antibiotics. See a physician for a proper prescription and antibiotic. Many physician choose zithromax (the Z-pak) as the broad-spectrum antibiotic of choice for a lung infection.