I recently found out that my grandmother, mother, and my mother's sister all have Graves' Disease. My grandmother told me I should go & get tested. I looked up what it was online & found that most of the symptoms fit my daughter to a T. She will be 2yrs old next month and only weighs 19.5lbs & is 31.5 in. tall. She sees a developmental specialist, GI specialist, & pulmonary specialist at Riley Children's Hospital in Indianapolis. Her pediatrician has diagnosed her with failure to thrive due to unknown medical condition. she has been tested for celiac sprue,CF, gerd, and quite a few other things and everything came back neg. She eats like a horse, very energetic, her sleep cycle is very abnormal-no matter how we try and regulate it there isn't any normalcy, i noticed her hair falling out-not in clumps but very noticable in her brush, chronic constipation-since 2mo of age. What kind of tests are there for this and how invasive are they for a toddler? she's been through so much already and i'd hate for her to have to suffer more. Any help or other ideas of what could be going on with her would be greatly welcome.