I just had an IUD placed in 5 days ago (Mirena, not during my period as is recommended, and they say to normally wait 7 days to have sex if that is the case), and I had sex last night, he finished in a condom, but fear pregnancy from pre-ejaculation and was wondering if it was advisable to take the morning after pill to be certain. 23, 145lbs, no relevant medical history.