Hey I don’t know if this helps but I’m just a bit smaller than you at 7stone 8lb and 5ft 7 also. I’m having 275cc high profile unders. Having unders for me is best as I have barely any breast tissue, because of my petite frame, 275cc will bring me to a large C- small D. You’re a B now, so you could potentially have overs but it depends on how much breast tissue you have. Make an appointment to see a surgeon, I hope it goes well 🙂 x