Yikes! Am I pregnant?!?!

Chelsea • Married in May 2011. I have two babies, both born on Valentine's Day 2012 and 2016. 💜💚
I am almost two weeks late... But the thing is I have an IUD. I started freaking myself out about being so late so I checked my strings just to make sure AND I COULD NOT FIND THEM!!! Am I pregnant?!?! Opinions please!