I don't know how to feel !

This app tells me that I'm getting my period on Sunday so I'm not late yet. But in some ways I really feel like I'm pregnant just because my belly feels a bit firm and my boobs are extremely sensative for the past two weeks. They feel a bit fuller too. I'm also on birth control and I don't take it at the same time everyday like I'm supposed to. I feel like I'm gonna be disappointed if I'm not pregnant. But then again it would be a good thing because I'm not trying to get pregnant. I'm not ready yet. Has anyone ever felt like this ?