DS had been complaining of headaches for a couple of days then on Thursday night he had temp of 39. I took him to the pead on Friday who did the normal ears, eyes, throat, chest test and declared him OK but to keep an eye on him. Last night whilst standing up from the sofa he collapsed and said his legs hurt. This morning he couldn't walk. We called the pead who said take him to the Emergency section of the hospital and get blood tests. 5 hours later DH and DS are still there waiting for the last set of results to come through. DH has rung and said that the results appear to be all clear but I can' help but worry. We had to cancel his birthday party which was set for today but essentially DS is in great spirits, no temp, no headache just the leg thing - any suggestions? Please?