iud life

I have the mirena. I’ve had it for 6 months. What are the chances of getting pregnant on it? I can feel my strings and that used to give me reassurance. I got an ultrasound awhile back and it was in place. Is it possible for it to move after awhile? I use condoms for the most part. We usually do it for a little bit (a minute) then put a condom on. Can someone give me their personal experience

- I sorta have a period. It’s just been lighter and lighter each month. this month I have not received my period but my cervix is sorta in the middle. I am cramping but that’s about it.

- please give me no hate. I don’t have anyone else to talk to about an iud. i just have the worst luck and it would be my luck being the 0.1%