Hello and welcome to HCM,
The immediate problem that you are facing is that of bowel movement.
You are experiencing nausea
alternating with loose stools, and passage of undigested food in stools.
These symptoms suggests problem in the large bowel.
You need to get stool examination and coloscopy.Colonoscopy
will allow to view the large intestine followed by biopsy
Biopsy and microscopic features will determine the pathology in the bowel wall.
These symptoms are seen in irritable bowel disease, inflammatory bowel disease
The management of all these disorders is very different from each other so exact diagnosis is required.
Consult your gastroenterologist for further management.
Thanks and take care
Dr Shailja P Wahal