My graves disease is back and im scared

I (20F) was diagnosed w graves disease at 14. I took methamezole and atenelol for a year and it went into remission. Now, im pretty positive its back. Constant anxiety, heart racing, heat intolerance, feels like i cant breathe my throat is so tight. Im scared that its back. Is it common for it to go back into remission after it comes back? Im hoping everything works out like it did the first time im just scared after reading sm horror stories on here.