Anxiety and Acidity. Some suggestions!

I have been facing anxiety, nausea sometimes vomiting (White clear liquid) after it got stopped and confidently going out. Did endoscopy said you have mild gastritis said to eat snacks at evening. No drinking and smoking habit.Don't have a habit to eat outside have reduce spicy food and non veg but still the problem is not gone. Always stomach upset, digestion problem constipation bloated sometimes feel very hungry and sometimes fell not hungry and anxiety Felling thirsty all the time drinking almost 4 to 5 litres every day and doing walking about 1 km everyday Morning breakfast 8 to 9 Lunch 1 to 2 Dinner 7 to 9 Bed time 10 to 11 Wake up 7 to 9 Weight 61 Height 5.6 Did all lifestyle changes but still problem not going Please tell some suggestions