The symptoms as mentioned by you suggest that you might be having Gastritis
The burning sensation in the stomach is due to increased production of acid in the stomach...which damages the mucosal lining of stomach resulting in ulcers.
Medical management consist of taking Proton pump
inhibitors like Omeprazole
,etc. (which prevent acid formation in stomach)
Also eat a soft, plain diet & avoid consuming irritating substances such as acidic & rich foods, caffeine, nicotine, and alcohol.
Try to sleep on the left side, or with your upper body raised.
If symptoms still persist, it will be better to consult a Gastroenterologist
There is no need to worry...you will be fine.
Wish you a good health & speedy recovery.
Thanks & Take care.