What Causes Heavy Vaginal Bleeding Along With Stomach Cramps During Periods?

I have my period now going on 10 days. I have clotted 2 days straight the size of the palm of my hands with no cramps. I started to get cramps on my eight day with lots of bleeding but the clotting is subsiding. I was diagnosed with intramurial fibroids. Should I be concerned and rush to the hospital