Hi there!
Well, without a detailed clinical evaluation it would be difficult to determine the cause of your symptoms. Possibilities that may need to be considered include dietary causes, malabsorption syndromes, GI infections, inflammations, medication side effect, GI motility disorders, hormonal/ endocrine abnormalities etc. I would suggest getting this evaluated by a gastroenterologist for an accurate diagnosis and appropriate management.
Hope this is helpful.
Take care!
Sorry, just realized this was posted in the wrong area. Can a moderator please move this to the appropriate location? Thanks and sorry about that!