im only five weeks post op as well hun, and i can imagine mine changing, as they are still rock hard and they havent changed since week two, so mine need to drop and fluff, im buying a few bras after my six week check, only four maybes five, as iv heard on here, some unders dont change properly until 10+ weeks, and i dont want to spend a fortune on bras now to buy more a few weeks down the line xx