concerned

my daughter will be 4 in august she has been potty trained since she was 2 but has recently started to pee her pants 2 or 3 times a day,,, she knows its wrong. she comes to me and says check this out and shows me she peed her pants, or says shes sorry. she has really been acting out for the past few months. she throws fits and will scream at me, slamming her door. she has even gotten to where she talks to me very disrespectfully she will say well i told you to make my lunch. she does act this way with others sometimes but not as bad i dont know why she is acting like this or why she is peeing her pants,,, any suggestions