Perhaps you are having gastritis due to alcohol consumption and smoking aggrevstes it.
Get your blood test done including CBC
LFT fasting glucose level
lipid profile renal function tests
Next Steps
take Omeprazole 20 mg twice 12 hours apart daily a week before food and domperidone 10 mg 3 times daily for a week , before food.
Supplement of
vitamin b complex tablets once daily will help
Health Tips
avoid spicy food,fatty food, alcoholic drinks and smoking