Okay So My Boobs Been Sore Since 2dpo They Never

Okay so my boobs been sore since 2dpo they never gotten sore so early its past a week in a half and they are still sore I can't sleep at night good because when I turn to the side it hurts, I've also have had light cramping on and off throughout the days , period is suppose to come on the 21 of this month . Could these symptoms mean am pregnant or hormones are just off cuz of my period that is coming ?