Hi doctor Andrew, My 11 year daughter feels nausea and fatigue since almost 3 months now. Her pediatrician checked up, took blood test and every thing is normal. She assumed its viral, and go off in a week or so. But she continues too feel feverish not fever really. Sheen bone and back feels achy mostly. We fail to understand how to get her feel better. She has not started mensus yet. Could it be pre puberty symptoms ?