Hi, I am 15 years old and I have just kind of started my periods this year,but they have been very irregular.. I had one for a week then didn't have one for 6months.. Then for one day then 3months.. And now I have been on for 22 days and I am freaking out! I am a ballet dancer and do A lot of exercise..?

Have your parent take you to the doctor. You may need to have your hormone levels checked.