The 2 fifths on the weekend is the culprit. By Wednesday/Thursday your body and your mind is screaming for more alcohol. Then when it gets it over the weekend the cycle starts all over again. It's kind of live Pavlov's Theory when he conditioned the dog to start salivating in anticipation of food when he rang a bell. When Friday is just around the corner your body is conditioned to anticipate alcohol when the bell rings. In this case the "bell" is Wed/Thu.