hello there ,
According to your clinical history i suspect you have suffering from acute pharyngitis
It is inflammation of the throat mucous membrane
caused by bacterial or sometimes viral infections seen post flu infection .
It presents with symptoms of sore throat, pain and difficulty in swallowing ,fever ,acid reflux as you have mentioned.
Altered food habits may lead to acid reflux which in turn leads to nausea and vomiting.
i would suggest you to start with antibiotic augmentin 625mg along with analgesics for 5 to 7 days which helps in subsiding the throat inflammation
For vominting you can start with anatacids like pantaprazole with antiemetics which gives relief.
maintain good oral hygiene
, use lukewarm saline water or antiseptic mouthwash like chlorhexidine
or betaine for regular oral rinsing.
i hope this helps ,