there are many reasons why you could be having frequent periods. at your age, the most common reason is due to a hormonal
imbalance. this could be a thyroid or prolactin
problem, or if could be due to polycystic ovarian syndrome
(PCOS), or being overweight
, or other possible causes. almost always, it is easily corrected by using birth control pills to regulate your cycles, which also have the added benefit if providing safe contraception
. you need to speak with your fictive so that he/she can help you get your period back to normal. I hope this helps, please let me know if you have any more questions.