A couple of times in my life, I have had my periods reach a point of being more a hemorrhage than a normal period, with bathroom changes every ten minutes. Makes it hard to leave the house. The first time the doc. did a D and C and that returned my periods to normal for about ten years. The second time we tried a mild birth control pill. I have just stopped that after 6 months trial. And things are OK for now. However, I have learned this sort of build up, or what ever it's called, is common. Treatment is not. See a doctor.