Thank you for the query.
Your symptoms can be caused by your diet, lack of physical activity and obesity. However bloating
can be a symptom of some serious disease like stomach or colon cancer
. This diseases are more common at obese persons due to bad diet.
That is why I suggest you to visit your doctor, have physical examination and consider gastroscopy and colonoscopy
(or FOBT - fecal occult blood test
You should also take care of your diet and lifestyle. You should increase fiber rich products. Avoid fatty foods, fried foods, spicy foods, alcohol, coffee. Do not eat before sleeping (last meal should be 2 hours before sleeping).
Hope this will help.