I am 13 and a virgin and I started my period last year in June. My period is now almost a month over due. I was due from the 5th to the 10th of May and I would be due for the second time next week. I have had cramps and back pains like normal and I am itchy down there. I also keep on getting worms and it is really painful. I don't know why any of this is happening can someone help?