My obgyn told me no sex for 3 days after getting my Mirena and to use a condom for 2 weeks to make sure I don't get preggers. welllll four days in, had sex and we tried to use a condom, but it just didn't work. I have used them before obvi, but not with my current bf and we both hate them. oops. anyways, he pulled out and everything, what do you think the chances of me getting pregnant are? that would just be so painfully ironic.