Thanks for posting your query.
With the available described details, there appears to high possibility of Acute gastroenteritis
Headache could be a prodromal symptom of viral infection.
Although abdominal pain
is present in right lower abdomen, yet there appears to be least possibility of appendicitis
as diarrhea is not a feature of appendicitis.
You should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up.
He should go for complete blood count
, erythrocyte sedimentation rate
, ultrasound imaging, and serum electrolytes, renal function test.
You should take complete antibiotic therapy, antispasmodics, probiotics, antipyretics, if needed.
You should maintain your hydration status by taking potassium rich liquids.
Take soft diet along with yogurt and banana.
Avoid milk and all milk related products.
Dr. Mayank Bhargava