Hurts to touch him

I have a 8 yr. old son that is having severe pain in his chest, back, knees, neck and his head. The pain comes and goes, but comes more at night. All the pain did not start out that way, he first was real constipated and was having chest and abdominal pain and as time went on he got more pain all over. He was diagnose with strep throat after having it for a month. He even started having double vison problems and now wearing glasses. He hurts all over his body even when you touch him. I took him to get a hair cut and he started screaming that it was hurting him, so the barber had to use special clippers to finish cutting his hair.He has all kind of test done and nothing comes up. I just don't know what to do for him. His primary doctor seems to think he has JRA (jr. rheumatoid arthritis) but I took him to a pediatric rheumotologist and he ran all kinds of test even lyme disease and no findings. Can Jr. Rheumatoid Arthritis hurt to touch.