Why I bleed to much when im in my period?

Fibroids/polyps? If you see a doctor for heavy periods, they will want to make sure that you don't have any fibroids (usually benign tumors of the uterus) or polyps (growths of tissue from the uterine lining). If you have always had heavy periods, you may want to make sure you don't have a bleeding problem in general. Sometimes there is no definite cause and treatments to make periods lighter can help.