Implantation bleeding or period ???

I usually log my period in 2 different apps for a better estimate of my cycle and they both been saying “period in 1 day” for like 4 days already. My periods usually on time no later than the 10th of every month and today’s the 11th. For two days I been seeing very faint pink on the toilet paper when I wipe but rarely it’s only like once and then it’s gone. Is it implantation bleeding or my period???