Persistent bleeding

My period came almost two weeks early and has lasted over 7 days so far. I thought it finished this morning but I have just had more blood. I have no pain or any kind of uncomfortable feeling. The blood has twice now come out like a flood! I'm thinking it might be stress but starting to worry. I have an appointment at the doctors but not until the 9th January. I've previously had two miscarriages but i don't this is one. has anyone had anything like this before?