text: ho wlong does it take to find out if ur pregnant? i quit my birth control 2 weeks before i had sex with my boyfriend could i be pregnant? its been 2 weeks since then yes, you could be pregnant.  it will take you longer to find out if you are pregnant than if you weren't on birth control, because sometimes it takes a while for your body to get back on a cycle after you quit birth control, so it is not abnormal to not have a period for six or eight weeks after you go off and that may not necessarily mean you are pregnant.  i would give it three more weeks and then test.  it won't hurt.  but if you get a negative, it doesn't necessarily  mean you are not.  the only way to know for sure is to get a blood or urine test done.  if you got pregnant two weeks ago they would know by now with a blood or urine test.