Welcome to Health Care Magic.
Based on the information provided you are suffering from recurrent Pharyngitis
secondary to GERD ( Gastro Esophageal reflux Disease
). All the symptoms you mentioned like indigestion, passing flatus point to the diagnosis of GERD. Due to indigestion and hyperacidity
the stomach acid reflux in to espophagus and pharynx , there by causing sore throat
Unless the primary cause is treated ( GERD in your case) you continue to have recurrent pharyngitis and esophagitis.
To treat this you have t.,o use Proton pump inhibitors ( Pantaprazole, Rabeprazole
, Omeprazole) in combination with pro kinetic agents ( Domperidone
or itopride). You have various preparations available in market in the above mentioned combinations like PAN D, OMEZ D, RABEZ D, DOMSTAL O etc.,. You might have to use this medicines for a period of 2 months. The capsule has to be taken 1 hr before having break for it to be effective.
Meanwhile you need to modify your diet as well. Avoid hot dairy products ( milk or tea or coffee) especially before going to bed. Avoid Cool drinks. Restrict fat intake and Deep fried foods. Try to avoid spicy foods. And do not forget to maintain atleast 1 1/2 to 2 Hrs gap between your meals and bedtime. Take plenty of green leafy vegetables and fluids.
This would definitely help you.
Wish you a healthy life.