Had three ultrasounds over last 3 months because of extreme bleeding for 3 days of my period! Ultrasounds showed my uterus with thick lining and enlarged as if I was 16 weeks pregnant and some good size fibroid cysts. Today the put a scope in my uterus found no cysts, no polyps, and no enlarged uterus. Said all looked normal. They did a dnc and said tissue samples be back in two weeks, I am 49 in July. How can ultrasounds show this, but once inside it's all normal?