Spotting or AF?

I started spotting 8 DPO, a week before AF. I kept spotting but it became heavier 11 DPO. I figured it was AF early, which never happens, but the bleeding wasn’t nearly had heavy as a normal period. Usually the first 2-3 days on my period I’m changing super plus tampons every few hours. This time I would go to change my tampon and it wouldn’t be near time to change after 4+ hours or so. My bleeding just stopped today and today was the day I was originally suppose to start my period. I’m feeling a little nauseous but could just be my mind playing tricks on me. What do you all think? Was it just an early period, implantation bleeding, what? I don’t have any pregnancy test on hand. Should I even take one? Thanks!