Hoping it is JRA

5 yr old son has frequent severe night sweats, fatigue and Severe fatigue, complains of leg pain, and has frequent unexplained fevers- sometimes 104.5, and is pale.  Last week his WBC was 34,000 sed rate was high, IGD was abnormally high, muscle enzymes were very high, but Platelets were elevated not depleated.  He had petechia. Dr thought it was a bone marrow issue.  He was given IV antibiotics which brought his wbc down, yet not his inflamation (inflammation) or anything else.  It looks a lot like JRA (arthritis).  One set of DR's wanted further testing to rule out Leukemia, while another DR said there was no way with elevated platelets.  Seeing a Rheumetologist, hoping they have answers.  Just looking for helpful feedback.  Sounds a lot like JRA, just would like to know what is affecting my little guy so much!