Many women suffer from breast pain just before their periods, this is called as Mastalgia.
This is completely normal and nothing to worry about.
This happens due to some hormonal changes during menstrual cycle.
This may also be associated with engorgement which results in tense breasts. This is cyclical Mastalgia and needs no medication.
However, if the pain is unbearable and persists through out the cycle , you should consult an expert gynaecologist.
Also, tight breast support, evening primrose oil and Vitamin E works well.
You should also look for any breast lump and other symptoms like fever or redness and tell the Gynaecologist about that.