I'm 21 yrs old. Its been about 8 months since ive gotten my period. & no, im not pregnant. Its just that ive been irregular since the first time i got my period. My mom once told me that she had the same problem when she was young and my twin sister is having the same problem right now. I wanted to know if that's bad for my health or if there could be any consequences later on when i try to get pregnant. What can I do?