Sharp pain

Today I woke up to sharp pain spot on the left side of my breast. It's not at the nipple or areola. It's just outside the area and when I press the spot the pain is excruciating and gets very uncomfortable. I've checked for any lump but there isn't anything obvious. I'm currently 27 weeks pregnant in 4days time and not breast feeding. I wonder why I have this unusual pain suddenly. Anyone experienced the same as me?