Mirena Iud

Hey guys I have a question. I'm not that knowledgeable on stuff lol. So my mirena iud hit the 5 yr mark at the end of may to beginning of june. I still haven't had the money or anything to get it taken out or even replaced. Me and my bf hasn't used any backup he's always pulled out, however he has rarely went in me since it's expired but recently he has, What are the chances of a pregnancy to cone out of it?