Crazy Heavy Bleeding, HELP

has anyone found anything that has slowed down they're bleeding? I'm on day 21 of bleeding and it's so crazy heavy I don't even know what to do. I can't get sleep. I'm passing such huge clots. I finally put in a menstrual cup and I'm feeling that to overflowing in 2 hours. it is supposed to last for 8 to 12! I have a huge pad and the menstrual cup and I'm still overflowing.