i'm in the same boat - have gone from DD to F cup in 10 weeks!

i have had a number of people say that, even though the wires fit well, the shaping of your breast changes throughout the day and this is where damage can occur as it becomes tight without you really knowing. i've had to move to mat bras already, but have a number of sports singlets with shelf bra, or sports bras - they seem firmer and more supportive...