Why does your left breast hurt 2 weeks before your period?

my left breast has been sore two weeks before i was due on my period it means your experiencing early signs of pregnancy some women get them. mine have been like that four times and all them four times ive been pregnant and that's in the last 6 and half month unfortunally i wasnt lucky and lost them all so be careful not to smoke or drink or have any little hit in ur stomach kk. from Andrea