Bigger breasts few days before ovulation

Hey ladies! I am a bit worried because I am experiencing bigger boobs since few days, but I still miss 11 days to my period. I use the pill regularly so my period is clockwork, and usually i only experience differences in the size of breasts a few days before it. But now it's like 2 days they seem bigger, and i feel it. Is It normal since I'm close to ovulation? It never happened before so I'm quite worried, everything i browsed on internet talked about pregnancy, which is something i really want to avoid - Yes again, i take the pill.