Not pregnant

I’ve been trying for almost 4 months now and I just got my period a day early and it only lasted 3 days.. which is weird because it always lasts at least 5-6 days. It was light on the first day. Second day was super super heavy to the point I bled through my tampon (never happened before). And the third day was super light again. The night of the 3rd day it was gone. Yesterday it was gone. And this morning it’s still gone. This wouldn’t be implantation bleeding right? I tried looking it up and it all says that implantation bleeding is always really light... :/ ugh idk