What Causes Extreme Fatigue While Treating Graves' Disease?

Question: Hello, I'm writing to give Dr XXXXXXX Endocrinologist, giving him an update regarding our discussions last night. I went back to my Primary Dr today for review of the nuclear med scan and the thyroid ultrasound. I told him that "I had spoken with an Endocrinologist and had sent my records to him for review and that he said I have Graves' Disease". He said that wasn't his area of expertise, and that he'd leave the final diagnosis up to the Endocrinologist. He did increase my Celexa from 20 mg to 40 mg and put me on Propranolol 20 mg before each meal. He said that any additional meds would have to come from the Endocrinologist. He did however, fax a referral to the Endocrinologist's office, and when I called to make my appointment, I was told I for some reason that I had to wait until Monday to set up my initial visit. I do have a question for you regarding the extreme fatigue. I work in a very busy restaurant in a busy huge hotel near XXXXXXX FL and as of last weekend, could not finish a dinner shift, do you know if it's common for patients to feel too tired to even go to work? I'm even thinking about taking FMLA leave until I can get on the any additional meds from the Endocrinologist and have time to adjust to them. In the meantime, I'm trying to take good care of myself and sleep as much as I can (which is sometimes only a few hours each night), and I hope the change in my one med, and the additional med might help with that. I spend the day exhausted and then have insomnia, it's just so much fun. Thank You, XXXXXXX XXXXXXX : )