possibly sick?

[escm]

heya guys,

so heres the deal. I fed my snake about two and a half weeks ago. a week after that he went into shed. shed was perfect all one piece, eye scales, the works...so i expect him to poop ya know...thats what he usally does...eat, go into shed, shed, poop, eat, poop, eat, poop...you get the point. well its been 3 days since he shed. no poop. in fact before this shed he was a kind hearted trusting youngin but ever since a week before his shed and so far after hes been incredibly skittish and generally pissy. now a before shed mood swing is a common thing, im used to it. but why is he still acting so nervous and why the no poop? Would it be ok to feed him even though he has not pooped since his last meal 16 days ago? Maybe a feeding session will get things moving again? Thanks guys for you help!