Implantation bleeding or something else?

Rebecca

Me and my husband are trying to conceive and I ovulated 9 days ago. Well today I woke up and I'm bleeding a lot like I normally would with my period but it's not supposed to start until the 1st and my period are very regular. Could this be implantation bleeding or something else? I'm not sure how much blood there normally is with implantation bleeding but this is a decent amount.