Possible implantation??

Hoping that this was the month I am preggers.... but im light spotting the last 2 days. I am pretty regular and AF should be here in 2 days. I'm never late or too soon, AF is always on the dot. Hoping that this is implantation bleeding if it's even still possible but idk. So not so much high hopes anymore and thinking AF is hanging out on the doorstep and may have to go another round next month. Any thoughts?