Every month when I get my period it is so heavy. I have to use 2 super pads and sometimes it leaks between my cheeks. I sit up right and don't move around too much. I don't use tampons for personal reasons. But what I want to know is why this happens. And also some times after waking up and walking to the bathroom it's flowing down my legs to the floor and I have to hurry to jump in the shower. What's going on?