Your symptoms are suggestive of a condition called irritable bowel syndrome
), however excessive proteins
and other dietary supplements can also cause these symptoms.
Are you taking any drugs to improve stamina or muscles too ?
Why not stop all the food additives and high protein diet for a week and see if it helps.
If that doesnot help then you will need a trial of some medicines called gastrointestinal sedatives and are used to mamage IBS .
You can take these under guidance of a gastoenterologist.