I Started Bleeding Two Weeks Early Or Late....and The Blood

I started bleeding two weeks early or late....and the blood is thick and dropping blood clots. And very heavy blood. Went through one tampon in 25 minutes. Entire underwear was soaked through. I also experienced very very strong pains in my lower abdominal. So much so that I could not even walk, stretch, or lay on my stomach or have any pressure put on it at all. I started bleeding Tuesday, I am still bleeding but not as heavy but still quit heavy. I am still dropping clots of blood. That can't be normal right?