What Causes Yellow Discoloration Of Abdomen In A Child?

Hello, my 5 yeras old daughter had a diarhoea last night and than was sick all night and morning, hat temp. is about 38.5 and her tummy is yellow, was thinking about some hepatitis? but her eyes and skin evrywhere else look normal. Can you please advise what this could be and if i should go to doctor or try 1 more night if it gets better it self? (Last 4 hours was better-no sick or diarhouea, just the strange colour and temperature) She is also on epilepsy mediacation (sodium valproat). Thank you for your answer.