Period late should I be worried?

Me and my bf had sex and he claimed he didn’t nut in me but i’m paranoid so i bought a plan b the same night just to be safe. I’ve had my mirena for 3 months and each month my period just comes whenever it wants but last month i got it on the 12th and im now 5 days late according to this app. I’m not sure if it’s just me being paranoid or if it’s nothing to be scared about. Any opinions?

i’m also freaking out because we just broke up...

update: i got my period no worries 🙃