text: how long does it really take to get pregnant? and if you get your period that means you are not pregnant right   the time it takes to get pregnant varies for everyone.  however, if you are young and have not achieved pregnancy in a year and a half, see your ob/gyn for an infertility work up.  some doctors will see you after a year but some are fairly rigid about the 18 months...especially if you are under 30 years of age.  it is not common to have a period when you are pregnant but it has been known to happen.