Hi... Welcome to healthcare magic.. According to your complain you have problem of whitish stool and abdominal pain that may be because of parasitic infection like giardia.. Some fungal clumps also look like white patch in stool... Food allergy also cause this type of symptoms... Consult a gastroenterologist for further diagnosis.. Stool examination test is helpful to detect any infection present or not... Detail history and physical examination give exact idea... I hope my guidance helpful to you... Take care. Thank you.