New due date! & bleeding placenta?

I had an early ultrasound done due to my doctor wanting to keep a close eye on me because I had a miscarriage in October and according to my LMP I would be due on 9/26.

Well my little baby measured a little further than we thought....

My first prenatal OB history visit was yesterday. They confirmed a set due day and it is now 9/23!

They also had told me my placenta was bleeding a little bit and that’s why I had spotting the day before I got the ultrasound.

Has anyone ever had that happen ? What’s it mean?