A couple weeks ago she asked me to penetrate her just once, so i did, dont think i got in too much, if at all. I did not ejaculate and i did not have any precum on me, (before insertion). Could she be pregnant? like i said, she's been 4 days late on her period, usually starts on a wednesday, every 4-Weeks. Getting to that point of- oh... oh shit. Could use a little help?