Starving hunger before bed on ECA

Hey guys, right now im runnin an eca/clen cycle and its going good so far, on my third week (first week of ECA) and have lost a bit. Here's the thing though, before I go to bed i feel like im about to literally die of hunger, I have a shake right before bed and the second I lay down my mouth starts to water...any idea's? The past two nights I was sooo hungry I ate a couple of tsp's of natty peanut butter (Yea, its the only thing I had...wish I hadent though)...any idea's on why this might be? thanks.