Spotting during fertility week

Mayra • 30 | MC 👼🏽👼🏽 twin girls at 18 wks | TTC 🌈

Have any of you ladies experienced spotting during your fertility week? I started ovulation testing on Saturday, CD 10 and it came back what looked positive. But yesterday CD 12, I spotted all day and this morning when I took an ovulation test it came back negative. Has anyone had this? Could it be I ovulated early? I’ve never spotted in between cycles before. So I’m just very confused.