Worried.

Noeyyy

So this might sound stupid but I’m extremely worried. I usually start my period three days before my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> tells me I’m going to start. It’s been like that for months now and this week I’m three days late on my app which means I’m six days late from when I usually start. I just recently started a new job and I’ve been stressed out because I’m going through nursing school. I’m on the mirena and that’s the other type of contraception I use.. I have period signs kinda. I’ve been eating a lot and I have been moody. Am I overreacting?