Has anyone gotten pregnant on Mirena?

So mommas… Have any of you, or know someone who has, have gotten pregnant with the Mirena? I have two kids and the pregnancy symptoms with both of them were obvious. One boy, one girl. I have pregnancy symptoms to a T this past week but I have the Mirena and have had it for 4ish years. How likely is it possible to get pregnant if you have the Mirena? I don’t have periods so idk when my last “missed period” would be as it’s been years. With that being said I wouldn’t even know when to test and/or if it were to be accurate. Advice would be GREATLY appreciated!!!