@mak_trouble891 If your boobs get sore around the same time every month then it’s probably hormonal. Just before your period there’s an increase of the hormone oestrogen causing breast tissue to swell and become tender.
Breast soreness can also be a sign of pregnancy, so if that’s a possibility and your period is late, it’s a good idea to take a test.
Sometimes breast pain can be a sign of infection or other issue. If the pain is really bad or focused on a certain spot, have your GP check it out.