Implantation?

Brittany • Our baby boy born July 2016 💙 Our angel baby was taken Oct 2018 💔 Our Rainbow baby girl born Aug 2019 🌈 Currently TTC 2022

So I lost my baby at 7w, on Oct 14. . I had ewcm 10 days ago. I'm having shades of brown spotting/CM all weekend. Nothing red. Is this my first period starting up. Or implantation?