Spotting 3 DPO?

Danielle • Dog Mom x3 🐕 . Married 💍 3.10.18. One angel baby (MMC @ 8w) 👼🏻. One IVF rainbow baby 🌈👶🏻.

Has anyone had spotting 3 DPO? I have a very regular cycle and have never had any spotting at this point in my cycle. I know it should be too early for implantation bleeding and I’m certain of my ovulation day, based on OPKs and BBT. I noticed it first thing this morning after using the bathroom. Thought?