My period is due after 3 days but my nipples have been aching for 2 weeks this never happened to me before they hurt even if i wear a shirt?

If you have had unprotected sex, you could be pregnant. If not, the breast tenderness could be explained by hormonal fluctuations. Missing oral contraceptives may result in a recalibration of your natural hormones which may cause a spike in estrogen. Plan B can also mimic these effects. Other causes of hormonal fluctuations include stress, lack of sleep, weight loss/gain, exercise and certain meds