I Had A Miscarriage In March And Then In April

I had a miscarriage in march and then in april I got the IUD mirena and I just got it out friday and then I had bleeding saturday and sunday and half of monday but on sunday I had unprotected sex what are the chances I am pregnant I am worried I bought pregnancy test just incase but I dont really want to waste them if I dont really have a chance of being pregnant if that makes any since at all.