Period or implantation?

I ovulated in the 22nd of aug and also had unprotected sex that night. This started 4 days before my period was due, I’ve had on and off bleeding/spotting for the last 2 days in the pictures is the heaviest it got, I did have a pad on but there wasn’t much on it. Could it possibly be implantation bleeding? As it stopped today and haven’t had any since.

Any advice would be amazing