Implantation? Period?

This month I did not get a positive ovulation test. I was unable to test twice a day due to running out of tests so I never caught a positive. According to glow I supposedly ovulated on the 24th. My period is supposed to start on the 7th. Tonight I noticed light pink spotting when I wiped after using the bathroom is it possible it’s implantation? When should I take a pregnancy test? Could I be starting my period early? Not sure what to look for and trying not to get hopes up. Thanks in advance for any advice/feedback.