Thanks for posting your query.
You should consult with physician and go for x ray
abdomen with ultrasound
You should avoid milk and all milk products.
If x ray abdomen is not suggestive of presence of fecolith then there may be possibility of gastroenteritis
is the culprit of all symptoms then you should take laxatives, plenty of water ans high fibrous diet.
If gastroenteritis the cause, then you should take complete antibiotic course.
Get well soon,
Dr. Mayank Bhargava