Plan b & now pink spotting a week later after taking it

Rachel

Hi ladies I have a strange situation going on ... Me and my boyfriend had unprotected sex a couple days before my ovulation day , I think the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> app said like 9% chance of pregnancy . Then he 💦 again the following day & later on that night My boyfriend got me the plan b , now eight days before my expected period I’ve been having pink spotting only when I wipe and I’m curious to know if this could be implantation or just my period is about to come ?? Can someone please help