A woman's breasts can keep growing in till mid 20's. And breast pain happens to all of us. I do remember my teenage years and that tenderness was severe, so I'm thinking u are ok but if u want to make sure u can always bring it up to a doc.
Your breats can grow into your twenties, so it could be that. Also, women can get breast tenderness that coincides with their menstural cycles, so it may just be normal tenderness.