Implantation bleeding?

My period was supposed to officially start yesterday. I started having super faint spotting that was light brown two days ago, and then it stopped. Last night I had a tiny bit of pink and it’s gone now too and I had a little more brown blood after that, but haven’t had to use any tampons or panty liners. It only showed with wiping. Could that be implantation bleeding? Haven’t tested yet as you’re supposed to a few days after spotting. My period still hasn’t come.