Thanks for writng your Symptoms are due to Gastirits and irritable bowel habits you should see what diet you are taking is it on proper time and avoid spicy food as if possible. Metallic smell stools are not due to ulcer as it is due to excess iron or Fats non vegetarian diet like red meat or fish you should see your diet schedule and type you are taking as you have not mention. If you are taking any iron supplement stop for few days. In the diet Schedule you should take lots of fluids, no spicy food, Fibrous fruits like papaya, orange etc. You can go for Ayurveda medicine like Syrup Gasex
or tab Gasex which you like. In choorna preparation Avapattikar choorna-1/4 Tsp with lukewarm water Thrice a day.