period was due 27th but it hasnt came, so i'm currently 4 days late. According to an app i wasn't ovulating, so far i've had cramps which i do think feel abit different but i know that may just be sub-conscious, i've also been nauseaus but not enough to stop eating or anything, i've also had sore boobs, i know these are all signs of your period coming too so i'm really not really sure, is their a chance i could be pregnant?