Hello, my 12 year old son has had symptoms for over a year. Started off with palpitations breathlessness. Became less active, stopped football, no stamina, irritable, mood swings, nausea, indigestion, loss of appetite. Also more recently pins and needles numbness headache and tinnitus. Apparently his TSH has gone up but in the last two weeks he is so exhausted he can t even go to school. Falls asleep in school and lies down all day now with pain behind ears and head and tinnitus. So worried