I don`t think a couple of drinks will cause you to lose your gains made in 9 weeks.
Your liver however my be hurting. Personally I never drink while I`m on. You should probably take it easy for a while. I'm no doctor but I think as long as you take it easy and take 2 tylenol you might not die. And try to control yourself.
Weed? never smoke either, but I can't see any ill effects other than eating a bag or 2 of cookies when you have the munchies. Then you may lose all of your gains
