I'm concerned about what my doctor told me yesterday. I'm worried and confused. My symptoms varied. Weight gain, acne, fatigue, irregular menstrual cycle (periods 3-5 months apart), I'm struggling so much in school right now I don't know if that's a symptom. I'm a 25 year old woman who is clueless about hypothyroidsm. What's next? I have an appointment tomorrow to start meds. But will i be on them for the rest of my life?