Thank you for your query on Healthcare Magic.
Your child seems having gastroenteritis
at present and it may be due to a virus or bacteria.
The mainstay of treatment is to maintain hydration by giving sips of oral rehydration fluids like Pedialyte
, coconut water, and lemon water.
Appetite will improve and comes to normal once the infection has been treated.
The sleepiness and tiredness
may be due to dehydration
and loss of electrolytes in the stools.
Try to increase ORS.
Stool to be tested for any presence of infection by doing routine, microscopy and culture.
I advise you to consult your Pediatrician
again for re examination and for investigations and for the advise.
Hope I have answered your query.