Barbara Bush was also diagnosed with Graves Disease, it is a hyper thyroid disorder, that is treatable. My wife had to have a thyroidectomy, for a hypothyroid. The thyroid is the thermostat of the body, too low or too high, it directly effects the metabolism.
Watch for potential weight loss, so eat well, fresh produce and meats. Lay off the processed foods, fast foods, except on occasion.
The standard medical approach is a TSH level, (Thyroid stimulating hormone),,,,,,scratch that get the labs for your Free T3 and T4 levels, done with a blood test. It is more targeted.
Radiation is the "standard" treatment, but is becoming outdated. There are many options.
My wife is a veteran nurse, Case Manager, Legal Nurse Consultant, Life Care Planner, RN, (she's got more letters behind her name) and has had her own issues with thyroid related conditions.
Prayers to you Guns. Please know prayers are coming your way, and if there is anything I can provide via PM, get copies of you lab reports. It is a very treatable condition, with the right doctor.
God Bless.
tw