my periods are usually spot on but sometimes they can be a few days late or a day or two early but this month my period is 2 weeks early and not normal like my other periods its like a light greeny pink colour and a very bad odour to it and i dont ever get really bad pains with my periods just faint litle pains which are copeable but today ive been roled up in a little ball with so much pain why is this i know its not right?