implantation bleeding??? help please..

"Af" came yesterday, but it's super light and I'm not having cramps or any of period symptoms. Tmi but my periods have ALWAYS been super heavy, but right now I'm only having to use one pad/tampon the whole day. Is this possibly implantation bleeding or just really light af??
Last month I had two periods, the first week and the last week, sonthat got me jacked up!! My normal period has been the 4-9. So I have no idea what happened!