Please help


So I usually get sore boobs before my period and my period is supposed to start in 2 days but my boobs have been sore for 3 days straight now. Is this morning before period? Keep in mind I’m sexually active but I know my body very well and i never fool around during ovulatttion and I fool around after I see “non-fertile” discharge that way I know ovulation is done. So why are my boobs sore for 3 days in a row now