On the pill but don't take it same time everyday. had sex the day before i was supposed to get my period. i have been nauseous ever since. pregnant?

Although: The timing is not a likely one - never say never with pregnancy. If you had a normal period - then you aren't pregnant from prior to that period. Take a home pregnancy test if you aren't sure. Use protection consistently but i wouldn't fret that you aren't taking them at the exact same time. (it's just easier to remember if you do).

You ovulate: And are fertile midway between periods not on or the day before a period. See doctor to see why you are nauseated.