My Breast r sore!!!

Crystal • Wife& mother to a wonderful little boy!! Hoping for baby # 2❤️👪🍼
Omg!!! My breast r so sore today!! They hurt a little yesterday but today they feel like two big melons& in having lower back pain! My af is due in 10days but I'm hoping for a bfp!!! I'm I over thinking this as an early pregnancy sign or is this just pms? And I've been cramping for the pass few days.