Question for IUD users

Okay, I've had mines for 6 months now & I missed a period on the 6th month . . Which is freaking me out a lil because I heard you can still get prego on mirena & now I'm also having side pains. I'm scared I may be prego..But it be ectopic ...has anyone been thru a similar situation? I know tht you can lose your period on it also but man I dnt think I like this IUD much 😳