Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of acute
GASTROENTERITIS (AGE) is more.
It is
gastrointestinal infection.
All your symptoms like vomiting, altered bowel movements,
abdominal pain, lethargy etc are common symptoms of AGE.
So drink plenty of fluids orally and keep yourself hydrated. Take oral rehydration solution (ORS).
Also tak zinc and probiotic tablets.
Avoid oily and spicy food. Take
pantoprazole and domeperidone tablet on empty stomach twice daily.
Do all these for 2-3 days and if you are not improving then
consult doctor and get done ultrasound examination of abdomen to rule out internal pathology.
Don't worry, you will be alright with all these in 2-3 weeks.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.