bigger boobs

So I know I am not pregnant and was concerned I was in April of last year. Been through a lot of stuff and been still yes now worries about being pregnant but know I'm not. I am on the combination birth control pill and noticed that my breast are enlarged looking with some veins near them. I just went to the Gyno yesterday and asked him he said that can happen and is normal. Who else has had this happen. My bra I wear andbhavent changed them are the ones with out any metal support in them. Please any help would help. Thanks krissy.