yep breast changes are one of the first signs and symptoms of pregnancy... doesnt mean this occurs early on for everyone, cause as we know pregnancy for everyone can be different but its perfectly normal! as far as your nipple changing back to the same color/size... more than likely for the most part they will change back but its not always the case... kinda have to wait and see... but MOST do change back....
this is a perfectly normal part of pregnancy :)