Period or implantation bleeding?

Taylor

Kinda weird topic to talk about but i don't feel comfortable talking to anyone i know so I'm asking you ladies for your opinion:

So I just got off of my period the end of Tuesday the 19th and this evening the 21st I realized I have light spotting of fresh blood. I know it sounds gross but my fiance and I have been TTC even while on my period; could this just be runoff of period blood or implantation bleeding? Normally I'd dismiss it as period blood but given that its fresh blood it just catches me as odd. I hope its implantation bleeding, my fiance and I have been TTC for a while now for our first