Spotting days apart

Jenn

I have a 28 day cycle, I very lightly spotted pink the night of CD 26, I put in a tampon and went to bed. I woke up with only a tiny bit of light brown on my tampon. After that nothing, skip ahead to tonight, CD 30, just went to the bathroom and had the lightest smallest amount of pink when I wiped. I did test on CD 28 , but unfortunately only after a 40 min hold. BFN

Has anyone experienced spotting that is days apart or does it sounds like AF may be coming? Thanks!