I've bin havin cases of spotting days b4 my period. it usually comes wit weaknes, fatigue, heavy breast&sore nipple. it goes on till my period starts.

PMS: Mostly, it sounds like you have big time PMS (premenstrual syndrome) which is a result of hormone changes that occur a few days before your period. That would explain most of your symptoms. While unpleasant, PMS isn't a health risk. However, I'm concerned about your weakness & fatigue which PMS doesn't explain. Please see a medical professional about this.