hi, my son ( age 6) is , again, complaining of leg pain and headache, with a bit of belly pain. He had a bout of diareah earlier too. The pain in his head is in the back , not the top of his forehead. he has been getting lots of headaches lately too. Any advice as to what may be causing this please? He had strep a couple weeks ago, but did get over that. Thank you ....