NW claimed Stewart, who's currently shooting "The Runaways" in Los Angeles (and is rocking a decidedly flat stomach), asked a friend to buy her a pregnancy test after she did some math.

If you really can't stand it a home pregnancy test may give you results by the end of the week but if it's negative and you still don't get your period try again in a few days.

If you really can't stand it, a home pregnancy test may give you results by the end of the week, but if it's negative and you still don't get your period, try again in a few days.