The doctor agrees that propranolol should be administered to counteract sympathetic overactivity. He also agrees that hydrocortisone may be useful to suppress the immune-mediated responses in Grave's disease. 

He recommends however that you also administer an antithyroid drug. Propylthiouracil is a good choice as it may exert rapid effects due to inhibition of de-iodination of T4. Finally he recommends that you administer iodine solution to temporarily inhibit release of thyroid hormones. 

Further development 

Sam is stabilized and discharged. She is very disturbed by the outcome of her non-compliance with her medication and decides to set a daily alarm on her phone to remind her to take her medication, which is now switched to methimazole as she is well into her second trimester.