There is abdominal infection with simultaneous throat infection
You should take antibiotics before this becomes worse or develop fever.
Drugs like - cefexime and ofloxacin
twice a day after meals * five days help a lot. Ondansetron
2-4mg once or twice a day for nausea
for acid/gastritis empty stomach in morning.
Take them for 5-7 days and you shoukd be fine. Dont worry, you can.discuss these with your GP and start meds.
Wish you good health.
Dr. Manisha Gopal