Implantation or early period?? Confused 😩

Ch
Hi all,
I'm am currently late for my period.... But experienced some super light spotting on the 7th, 8th & 9th of this month... Which has never happened before.
After looking at my glow calendar - 7th was my last 'fertile day', does this mean I've basically bleed at end of my ovulation. 
Does it mean there is a chance I maybe pregnant, or does it mean I just had a super light early period ?!? 
So confused. Thanks in advanceÂ