Barely there spotting

Hello all, I’m on day 28 of my 32 day cycle. This week I’ve had on and off VERY subtle spotting. I mean, to the point where if I wasn’t so focused on tracking everything about my body, I wouldn’t have even noticed it. It’s only when I wipe, and it just adds a slight pink tint to my creamy CM. Anyone ever have this happen? If you did, was it just early period weirdness or was it related to pregnancy? Took a test today and got a BFN, but last time I didn’t get a positive until a few days after period was due so who knows!