Hi Andrew. Welcome to the Board! You used to be on Synthroid? I guess you were hypo then. Your hypo however, may have been a precursor to Graves Disease which is hyper and which some of your symptoms suggest...but some symptoms also suggest that you are again hypo and it is possible you may be dealing with Hashimotos thyroid disease.
However, we will not know unless you get the propper blood tests: FT4, FT3, TSH and the antibody tests for Graves Disease and Hashimotos disease. Andrew, once you have these labs you will be in better shape to find out what is going on. Well, if your doctor is "not very happy" , it is only because he cares about your health...don't let that prevent you from going! Let us know how it goes, good luck. Hope this helps.