Yes there may be a problem with your stomach. For that you have to stop smoking
if at all you are in this habit stop tobacco and other products eat easily digestive diet
, fruits and vegetables and plenty of water. Warm milk before going to bed. Eat aloe vera
pulp in morning and two glass of water early morning on wake up and go for a walk and do exercises. And take cap becosule twice a day for a week. You will be fine.