D.W.
You do know you don't have to stop nursing because of this right? It's very common to have a bump in the nursing road around 9 months. You could give her a bottle at night if you need your sleep but continue to nurse during the day. If she is restless it could be she is power nursing and getting what she needs quickly or you might need to get her in a quiet spot without disruptions to nurse. Babies don't nurse as often at her age and most are quite proficient at her age. You really don't have to give this up! And I completely know how you feel. I just weaned my daughter at 20 months.