Hello, I have a 10 year old boy who has been...

Hello, I have a 10 year old boy who has been suffering from acute diarrhea for almost 40 days now, all the analyzes have not pointed out any abnormalities, the weird thing is that his diarrhea starts with mixed colored stools. yellow followed by pure water without color, even if the stools are normal sometimes, they are followed by pure water, 1 month under antibiotic treatment gave no results, test for allergy to milk or wheat n 'nothing given, am I really lost?

Doctor's Assistant: Have you seen a doctor about this yet? What medications are you taking?

Yes, a lot of antibiotics and bunch of lab test along with ultrasound

Doctor's Assistant: Anything else in your medical history you think the doctor should know?

Nothing that I know