Implantation bleeding or period?

My period is due today. I thought it was starting so I put a pad on. It’s been 3 hours and there’s only been a very small amount of brown blood and then some light pink when I went to pee. Is it possible to get implantation bleeding this late? I’m not having much cramping either which is weird because I’m usually in severe pain on the first day.

Update: it was my period