If you have a thyroid condition, the medication to treat it doesn't have any really bad side effects. If you are not taking any medication at all, not even birth control, and you have been bleeding for more than 2 weeks, you should go see the doctor. Anemia is not the cause of this.
i forgot to mention that i'm pretty sure that my thyroid levels aren't normal. i was told this by a doctor a while ago, and i never really got it checked out. could this be the cause? if so, what are the symptoms of whatever thyroid condition i have, and what are the effects of medication?
I'm not entirely sure to be honest. I would call your doctor. 3 1/2 weeks is a LONG time. And I'm a vegetarian and I've never had that problem. I would definitely call your doctor. Even though it's probably nothing to worry about, just to be safe you know?