One day period/spotting

Co

Okay so we’ve been TTC for a couple months.. every month I have my period it’s 6-8 days long. This period came a little later than usual, and lasted probably not even a full 24 hours?? It looked like mostly old blood it was brown but kind of tinged with CM.. that was Sunday and no yesterday and no period this morning either.. would y’all think this is implantation bleeding or have any of you guys had a period start light, take a break , then come back ?