If you're just looking for areolar reduction (making the dark circle around the nipples smaller), there's no reason not to go ahead and have it done if it really bothers you. You'll have 3 more years to enjoy your new breasts before pregnancy changes them. You cannot predict exactly how pregnancy will change a breast, so you may or may not need to touch up that areolar reduction after pregnancy.
Probably not.An areolar reduction can be done by itself or as part of either a Breast Lift (Mastopexy) or a Breast Reduction (read link below to understand similarities and differences). With Pregnancy the breast will grow and stretch the entire skin envelope, including the areola. Any tightening of the areola and or of the skin envelope will be affected - the areola will be stretched as will be the skin envelope.Dr. P. Aldea