S.H.
Regarding distractability:
I noticed that my son started to become very distracted while nursing right around the 4 month mark. I attribute this to the fact that he is now more aware of his surroundings and is use to a quiet environment when he eats during the day. If anyone is talking to me, he will turn around to look at the speaker - likewise, if I am talking to someone, he will stop eating and watch me.
Fortunately, I am able to nurse him in a quiet environment much of the day and request that my husband wait to speak to me or the baby until after the baby is done nursing. I imagine any external noises and sites (radio, television) would also be equally distracting. You might want to try nursing your daughter in a quiet, distraction-free environment.