Hi Gemma, I had 450cc’s about 6months ago now, when i first had my strapping off i thought they were too small as i also got told i would be an E. After they dropped however mine appearred to be alot bigger than before/ fuller. I would not worry about what they look like atm as you are still in early stages!
I now meassure a 30f/30ff now!
Best of luck! xx