 [ Symptoms ] i have the mirena iud and recently i had unprotcect sex could i be pregnant  my partner didnt pull out before ejaculating and no other form of birth control was used sorry for the over share but i need a straight answer [ Disease ] the only definite birth control is abstinence regardless of the kind you use be it pills depo iud etc there is always a chance of getting pregnant however small it may be i have two friends that got pregnant on birth control the only way to be completely sure if you are pregnant or not is to take a pregnancy test