Spotting 2-4 dpo

Hello, I’m currently 4 dpo which was verified by opk testing and temping. I’ve been having some mild cramping and spotting since 2 dpo. It has been pink or red mixed in with quite a bit of stretchy cm. I will often start spotting about 4-5 days before my period, but not this early. I have had ovulation bleeding before, but that’s usually the day of or 1 day after, and doesn’t last this long. Just curious if anyone else experienced this. Maybe it’s some weird thing with my body this month. I know it’s too early for implantation bleeding. Thanks!