I went from a 10A to a 14C my boobs didnt stop growing till i was about 32 weeks
Your cup size hasn't changed as yet. As you said, you are still a 'B' cup. It's simply the size of your ribcage that has changed thus far. You will continue to gain some cup size as your pregnancy continues. Of course if you decide to nurse, and your milk comes in, that's when you'll see the most difference in your cup size! Best of luck, take care...
Thanks for your help. Just thought I would ask because I have a friend whose expecting too and she was an A cup and now wears a DD. I know every woman and pregnancy is diff.
As far as breast size changes go it all varies from woman to woman... there isnt a set time frame when these changes occur or how much of a difference each of us will get... you may notice yours will grow on and off throughout the whole pregnancy or may grow all at once, or may not really see much change till your milk comes in... there really isnt a rule for this... but be careful not to stimulate your boobs too much if you notice colostrum(you may or may not notice a small amount leaking throughout your pregnancy) cause it may make then leak more and you will have enough of that to deal with once baby arrives ;)