Postpartum Period

Hi ladies! I’m just so confused about what’s coming out after having my son... I stopped bleeding for like 5 days . That was the longest since I’d had him. Started flagyl for a suspected BV . I’m on day 5 of 7 of that. And now I am having like old blood mixed with new blood discharge. So I’m wondering, is this a period? I’m exclusively pumping and 9 weeks pp. I don’t have any cramping . So if it’s a period is super weird. I need some guidance.. I have been to my OB but this has just started the last day or 2 🤦🏽‍♀️