Implantation spotting or just AF arrived 5 days early?

Kristina • TTC for baby #2

I started spotting today. It’s reddish/pink and it’s mild amount but I’m 5 days before my period is due and my period has been on point every single month. Also, I feel no cramping. Could this be implantation bleeding or AF just decided to come early OR could this be a sign of a chemical pregnancy? Please help 🙏🏻