13 days late! 😩

Yui

So I have an IUD so my periods are a kind of weird. I get it every 35 days or so and it lasts 3 days. My concern is, I’m 13 days late this month!! I’ve been feeling nauseous lately but then the stomach flu is going around my work so I could just be paranoid thinking I’m pregnant just cuz I’m so late. What do you guys think??