Spotting

I’ve been spotting since 2 days post ovulation. It is a week later and I am still spotting(not enough to fill a panty liner for the whole day), 9DPO. Any ideas on why this could be happening. I normally get very heavy periods and they never come that early so it still way too early to consider this my period. Words of advice please :) I took a test and if cane back not pregnant but it would technically still be too early to know.