ElkWarning you need to get a copy of your so called normal tests.If your sister has it you are 85% going to have it as well.Demand the antibodies test be done on family history alone.
Check out Graves' disease along with Hashimoto's you will know if you have it.Just remember I had normal tests for 26 years.But I had all the symptoms and they failed to ever do the antibodies test.
So I had every symptom,family history,a goitre,a baby born with cleft lip and palate and for 26 years they did nothing.
Please push and push till you are satisfied the more of us that get the antibodies test and report back on this forum the better.Goody luck honey 😀