My gf and i have had unprotected s ex once of twice and she tells me her cycle is 28 days but... its very irrgular and its day 21 and still no period. She feels PMS cramps bloating, being tired and that stuff. we did it on day 28 and then she wiped and she says there was a little pink. i thought maybe i maybe jump started some of her period. just wana know. She feels PMS cramps and bloating and boobs hurt a bit. if she is feeling this what are the chances of her STILL being preg?