Implantation bleeding maybe??

Can you have implantation bleeding after a missed period? I’ve been tracking my period for years, and I’m pretty regular. It is sometimes a day off from the app I use to track it (usually comes a day before the app says I’m supposed to start) well as of today I am 9 days light and I’ve had light pink discharge just when I wipe. It’s haven’t gotten any heavier, and it’s barely there. Could it be implantation bleeding or is that even possible?