Perfect relationship gone suddenly sour, & she's pregnant too.?

i am normally a very cuddly lovey person and was throughout my whole first pregnancy but now in this pregnancy i dont want to be touched or anything. occasionally i will want to but its rare. it could jsut be her hormones and everything really messing with her. but be cautious cause it can also not be a goo sign so try to talk to her about why shes being that way.