Looking for advice..

I miscarried on July 4th my miscarriage was very mild. Very light to no cramping. It started as brown discharge and then the bleeding picked up a little bit when I passed the gestational sac on July 4th.

Since then.. my bleeding progressively got lighter. Almost not even brown anymore but tan like it was going away on July 11th. The very next day it picked back up to bright red and mild bleeding. More so when I used the bathroom. I was only using pantyliners, just changing them more frequently.

On July 15th it started to lighten up a little and change back to brownish/darker blood and flow. It’s now the 19th and it’s still going on, very dark. Is this normal???

I contacted my doctor and she said i could come in for an ultrasound but it was almost if I wanted to reassure myself. Has anyone experienced this? What do you suggest?