Is it normal..

Okay so my boobs have been hurting for three weeks(right after my period last month). I swear it was the worse pain possible. I couldn't even sleep.I thought maybe I was pregnant. Well now I started my period three days early. Its super heavy on the first day. But I didn't have no signs that it was coming. Usually I get cramps two days before. Usually it's light the first day then gets heavier the next. Idk I am freaking out and need advice😰