How long did postpartum bleeding last?

I’ve had two or three times when I’ve been done bleeding for a day or two and I think I’m totally done, and then I get spotting of bright red blood again for a day until it tapers off. I’m almost 4 weeks postpartum. I don’t feel the need to call my doctor, I can just wait for my 6 week appt, but just curious what others’ experiences were.