Husband and Drinking during pregnancy

Amy • I`m Amy. I love to hike with my dog cruiser and my husband Brett! We also LOVE international travel!
Anyone else's husband partying non-stop since finding out about baby? My husband has increased his drinking and partying since we found out I was pregnant. He says he needs to "get it out of his system before the baby comes." We both liked to party and drink pre-baby news and I don't expect him to stop fully, but I feel like it is getting out of hand. How are other people handling this situation? I understand he is scared/nervous about this big life change and I am trying my best to be supportive, but I don't know how much more I can take!