When will the bleeding stop?

Sarah • TTC since April 2016. MMC #1 Sept `16 MMC #2 Jan `17 Ectopic and Tube Removed Nov ‘17
Bleeding on 13th, had a scan on the 16th showing heathy 8 week baby, bleeding continues, further scan on 18th. No baby. Didn't have D&C as I am worried for complications but I'm still bleeding. When will it stop? Been bleeding for nearly 3 weeks continuously now, have another scan tomorrow to check I don't need a D&C. I will ask them then but I know I'll get the healthcare professionals answer (I know this because I am one!) I wondered if anyone has experienced the same thing and when they finally stopped bleeding? 
This has been horrible and devastating anyway without a daily reminder in blood 😢