Anyone ever get pregnant on Mirena?

I’ve had the mirena for a little over a year now. I’ve had 3 kids last one was in Dec. ‘22. I didn’t get a period back, not even spotting, until early Dec. ‘23. I breastfed until October is h of ‘23. I’ve had normal bleeding periods for December, January, and February, and now am a week late for starting my period. I don’t feel pregnant at all. Idk if it’s just my body regulating to no period again or if something else is up. The last time I had the mirena before I got pregnant with my 3rd baby I only had like 2 periods the whole time but spotted continuously for 6 months after it was inserted. And then I went with no period at all for almost 2 years before I had it removed. Anyone else have this problem? Sorry for the long post!