The very fact that you are asking means you think it might not be normal.

If it were me, I would get it checked. Any lumpiness in the breast should be checked, the soreness is an additional reason to warrant getting at the very least an ultrasound.

Good luck, don't fret, I have one troublespot spot in my boob, it could just be "normal" for you. But please see your doctor for the very small chance that it's not.