Hi Laura,
In early Graves disease, if your thyroid levels rise suddenly, they'll show up as elevated and abnormal before TSH has a chance to fall. This doesn't happen often, but it seems to be what's occurring here. Thyroid hormone is very potent, and changes, especially when a sudden rise occurrs, are more likely to cause noticeable symptoms.
Propranolol is perfect for reducing tremor, cardiac symptoms, and any symptoms of anxiety. Your doctor may first want to run a TSI and/or some other tests to confirm that you have Graves' disease before starting more specific therapy. Best, Elaine