Welcome in H.C.M.
I have gone through your query regarding white coating over tongue, dry mouth
, excessive mucus, belching
Your all symptoms are related to dyspepsia
and hyper acidity. As you said about severe bloating, wind pass, and indigestion
it signifies about your level of gastro intestinal disturbances.
I will suggest you to take-
1- Antacid with PPI.
2- Avoid spicy foods.
3- Take diet having good amount of fiber.
4- May use some digestive enzymes after meals.
I hope this will help you.