For your first question the answer is no, as Haemorrhagic stroke 9 years back cannot produce these symptoms now. Secondly you have not mentioned the duration of symptoms.
Anyway Constant diarrhea, abdominal pain
after eating, nausea with vomiting with normal Gastrointestinal evaluation is consistent with subacute intestinal obstruction
associated with bowel adhesion, Colitis, Food poisoning, Giardiasis
, Irritable Bowel Syndrome
, etc. however further evaluation needs more elaborate and precise description of symptoms.