IUD, late AF, & spotting

Kyla

Ive had the Mirena iud for almost 4 years, and already have two children. AF always is on time, every month. Expect this month, i was suppose to start 12/15. I was spotting 12/13-12/16. No more spotting, and I’m on my 3rd day of a late period. And this morning, digital pregnancy test was negative. Any advise?