My sister-in-law was just diagnosed with Graves’s disease and hypothyroidism. For two years she has been going to doctors who have either thought she was bipolar or using street drugs. With much persistence’s from my mother, it's been reviled that she has Graves’s disease and is hypro. Can you have graves disease so bad that it would seem like bipolar and I thought Graves disease was an overactive thyroid, so how can you be hypro?