Why do they hurt??

Bethany • Hey everyone, Im bethany. Im 24 & from Oregon. I have lots of medical issues & was adopted at 2 yrs old.
For the past week now my breast have been hurting. Im not on my period & im not suppose to start for another week. Ive had lower back pains and light cramps here & there as well. Could it be early period warnings? Or possibly PCOS doing this?