I've been bleeding on and off in this pregnancy since about 33 weeks everytime it has happened I have been checked out and no cause has ever been found. This morning I woke up to quite a lot of blood and went in and they checked my cervix said it's not that and they don't know and sent me away. But I'm still bleeding and my belly is slightly cramping but nothing too painful like this morning. Does anyone have any idea what could be causing it?