Bra problems

Leeza
So when I go to sleep I wear my bra because it always feels weird off and I'm not used to it. Well when I put my bra back on, if I slept with it off, it's like it doesn't even fit because it's just full on air pockets. Then throughout the day my boobs get kinda sore and they hurt and all of a sudden my bra fits perfectly fine and there aren't any air pockets at all. It happens everyday. I don't know if I have my bra up to high or if it's too tight around my chest and my boobs gets swollen because they are so sore or what. I mean it fits comfortably on me so I'm not sure what's going on. Anyone think they might know?