Breast tenderness

1 week after period 2 weeks before period and my boobs are so tender. Like even wearing a shirt hurts. Has anyone ever experienced this? I have no idea whats going on. The only other time theyve hurt like this is when I was pregnant with my 2nd and when I was breastfeeding her. I wouldn't think theyd already be hurting. Its to soon. Any ideas of whats going on??