What's going on with me?

Ok so Sophie is 6 weeks old today and I thought my lochia had finished and then all of a sudden a few days ago it came back. It's not light brown and a little amount. It's like dark brown and about 2 teaspoons.
Is that normal?

With Abby I finished my PP bleeding at 3 weeks. I know 6 weeks in normal but if it had already finished then why would it come back?
I don't think it's a period because the blood is not red...