I agree with Kristi- NO NEED TO PUMP AND DUMP! In the book, "The Ultimate Breastfeeding Book of Answers" (recommended by Lamaze international) Dr. Newman states, " I despise the expression "pump and dump" because it treats breastmilk as if it were some sort of disgusting fluid...in many jurisdictions, you are considered too drunk to drive if you have .08 percent alcohol in your blood...this is a blood level of alcohol that can cloud your judgement when you operate a vehicle, agreed. But if the mother has .08 percent alcohol in her blood, her milk will have .08 percent alcohol. Now this is a completely different situation. Wine is 10-12 percent alcohol, beer 3-5 percent and hard liquor approximately 40 percent. So called dealcoholized beer actually has .6 percent alcohol or seven times more than mother's milk will contain if she has a blood level of .08 percent. You can drink a liquid that is .08 percent alcohol all day and night and it won't affect you. So how is this likely to harm your baby? The formula the baby would receive-while the mother is throwing away her milk is know to put the baby at greater risk for a host of illnesses and problems..."
I hope this helps. There is more information in this book as well but I thought this might help you. Obviously you shouldn't drink a lot or all the time, but as Dr. Newman states-then the baby would more likely be at risk from neglectful behavior than from the acohol in breastmilk.
Look at many other countries where many woman will even have a glass of wine with dinner when they are pregnant. I'm sure everyone will think I am a bad mother for writing this but I say go ahead and enjoy a beer, glass of wine or even a cocktail-even with the baby at the breast. Why not-you have to digest the alcohol before it goes through your bloodstream and into your milk anyway. You will soon learn that your breastmilk is way, way too precious to pump and dump. I greatly enjoyed my first beer when I got home from the hospital, my daughter is now 2, can count to 20, say her ABC's, talk in full sentences, identify letters and numbers. I don't think my drinking while nursing affected her development. But it sure helped me relax and get some sleep those first few months:)
enjoy your new baby!