I did the same. Pumped and dumped every saturday so I could drink for 5 months then one weekend I did it Saturday and Sunday and my milk dried up completely! I was devastated and guilty! I found it weird why I could stop so easily for 10 months with baby. The stress of being a new mum sent my drinking to new levels (daily). Only evenings but sooooo much! Baby's sleep a lot so I could handle the next morning quite easily but now I have a 2 year old I'm so glad I'm sober! They are soooooo energetic and my patience is crap when I'm drinking. Keep trying hun, keep reading, keep posting! All the best