Hi Ihave A 10 Year Old Nieces She Has Been

Hi Ihave a 10 year old nieces she has been having her stomach hurt now for 3 weeks she has had blood work done it was ok she had a altrasound done it was ok oh she also is vomiting today she had a upper an lower scoop thay took some biopcis said everything was ok she is in a lot of pain an we don't know what to do? please help