My four year old has been ill on and off with a high fever for over 2 weeks, complains periodically of stomach ache headache sorethroat but he doesnt really have any symptoms, he was admitted to hospital mon with high fever, bloods came back at crp 62 but no signs of why, repeating bloods next day when fever was down crp 100 sent home with a fever, had a fever in nite, fine duriing day til high fever mid afternoon and early hours of morning, woke up today with rash on trunk , neck and face no temp this morning but temp again this aft, any ideas??