my friend has been on thyroid medicine for a long time and stopped taking it cuz she said she forgot but she also says she doesn't need it. Now she is experiencing dizziness, blackouts,fainting,memory loss,confusion, fatigue, heavy feeling in her extremities, sweating then freezing. She just started to take her medicine again a week ago.She has to go back to the doctor in 6 weeks to be evaluated. What is the worst case scenario.