Hello,
* The constellation of symptoms can be from various reasons as endocrine malfunction such as 
thyroid disturbances or exaggerated GERD or else.
* Primary guidelines for better recovery
- drink more liquids in sessions
- consume frequent meals of small quantities
- avoid spices, non-veg, junk foods, dairy fat
- control blood sugar, weight, 
cholesterol levels
- avoid 
smoking, alcohol if consuming
- manage sound sleep of 8 hours
- avoid stress and anxiety
- intake of 
omeprazole with sips of water morning and evening till symptomatic recovery
* Discuss need of upper GI 
endoscopy with your treating doc when you visit him or her in the next scheduled appointment.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Bhagyesh V. Patel, General Surgeon