Is this implantation bleeding?

Veronica

Ive missed my period for 3 days now and still haven't taken a test yet. Is this implantation bleeding? It happened at work today and it's been brown and it's barely any when I wipe

Also I'm sorry if it's in the wrong group idk what other group I would put it in

Update:I started Monday night and it was super light and it just ended at 11 today... I'm so confused