My 7 year old son has had fever, headache, abdominal pain , joint pain and nausea since October of 2011, symptoms returning about every 6 weeks. He s been tested for RA, Lyme, periodic fever syndrome, lupus , etc. His SED rate is the only thing elevated. Has gone up to 88. Have seen ID drs and rheumatologists. He s homeschooled now because of this and it stops him from living life. What s going on????