Well looks like she has really something going on her chest it means that there must be something big going on her mind and makes her like that...or maybe that you have done or said something that you don't know at all you know us guys we always think you guys are mind readers and we always does it on our own way like being moody its a way of us telling that youve done something bad that you have to be sorry foryou have to talk to her...seriously or dont wait for her to talk to you coz you could wait foreverjk ask her straight away...if theres anything that you have done wrong?or is ask her is shes not feeling well...maybe she's not feeling well. we women always wanted to have a man that is needed not to be told everytime what we wanted but instead we wanted someone that is sensitive enough to know about women....but boys will always be boysanyway try your hardest i bet she will talk to you just pick up the best line to start it...goodluck! and also if she is delayed better get a pregnancy test kit...maybe it could be high hormones sleep a lot, she once fainted mood swings...:d