Hi, I am 21 years old and I started my cycle when I was 11. My period has never been regular, I have my period every two-three months and it's extremely painful the first or second day, it lasts between 7-15 days. Every now and then I get lower pains in between periods, and sometimes I have large blood clots (half a golf ball size). I am very worried and never got this checked out because I am afraid of what it may be....the pain is so intense to the point I lose my breath sometimes. This can't be normal...I know no one else who experience their cycle the way I do....any clue? Cause I have none. I even wonder if I am able to get pregnant. Seems like that's impossible too.