long periods

So I've always struggled with long and heavy periods. I've been to the doctor and had an ultrasound done which was basically normal but did show some signs of a thicker lining of my uterus so my doc ordered a d&c; and that didn't do a damn thing, still heavy and still long. Most of the time my period lasts

about 8 days. Any ladies out there have this problem? If so did you find a way to shorten your periods? I have read that exercise helps and I workout pretty regularly which has helped my cramps but not the length of Flo! feeling frustrated! 😣