My last day of period was april 19 2015. and my breast started feeling hurt april 25 2015 until now.and never felt this way before? what it was be?

Breast pain: Breast pain is often related to weight gain, dietary changes, changes in exercise patterns, caffeine intake, poor fitting bras or clothes, breast cysts, fibrocystic tissue and others. Schedule a visit for an examination. If needed the doctor may also order a mammogram or a breast sonogram to better evaluate the area. If you think you might be pregnant check then check a home pregnancy test.