Hi, 
Noted the history and understood the concerns. 
The commonest causes I can think about your symptoms of gases, 
bloating and 
indigestion are as follows:
Intestinal infection.
Aerophagia, aerated drinks.
Intolerance to certain foods and beverages.
This can be diagnosed by the following ways:
Get stool sample checked for three days.
Tests of blood for CBC, sugar, 
thyroid, renal, liver and kidney functions.
Ultrasonography and X-ray of abdomen in standing position.
Clinical examination and correlation of the test reports by your Doctor will give a proper diagnosis and thus allow a proper medication to get a possible cure.
Also notice the foods and beverages which start or increase your problems and stop all these altogether.  
Hope I have answered your query. Let me know if I can assist you further. 
Regards, 
Dr. T Chandrakant, 
General Surgeon