possible pregnant?

hello! so i had sex right before my period started, literally the night before. so my period lasted until the 6th and it went away (i just didn’t update my app so it says my period was longer) but yesterday and today i’ve had on and off dark brown spotting and clear discharge as well that i only see when i wipe. could have this been implantation or my period ending? i know it’s super hard to tell, and i won’t know until i test, but just wondering if any other ladies had gotten pregnant after they’ve had sex right before their period ended? and as of today i’m not bleeding at all besides heavy clear discharge .