What is it like to get both addisons and graves at a young age?

What's it like?: It's a LOT better than dying. Both illnesses are deadly if missed, miserable until they are diagnosed, relatively easy to manage once the call is made. Both are often mistaken for "mental illness" until the right call is made. Both will ruin one's ability to study / work / learn the useful skills that one needs. And their presentation is variable. Just be glad the call got made.