Implantation bleeding experiences?

Brittany • Our baby boy born July 2016 💙 Our angel baby was taken Oct 2018 💔 Our Rainbow baby girl born Aug 2019 🌈 Currently TTC 2022
Not sure when my ovulation was. Sometime probably last Saturday to tuesday-ish. . I just had brown spotting when I wiped. Nothing on my pantyliner. My period shouldn't be here until like Oct 3. Thoughts?