I am planning on having one glass of champagne tonight, and I am breastfeeding a 4 month old. I have had a couple of drinks since her birth, but not more than one glass at a time. With my first I used to think that it made him sleep well the next day but have found with my daughter she appears a bit unsettled the next day. I do try and have it at night when she has her longest gap between feeding but lately she is feeding every 3-4 hours 24 hours a day!!!