I am concerned about my 13 year old nephew. He has been having headaches, dizziness, extreme fatigue and shoulder and hip pain. He is missing school, he was tested for Lyme, mono, flu and strep all of which are negative. He has a good morning and then feels lousy later in the day or he can feel good for 2 days and then he starts all over again. He also had his eyes examined and all was well. Any thoughts or suggestions for further testing? He had ITP as a young toddler