snake not eating; should I be concerned?

hey guys I ended up getting a kinsnake, and after a particularly rough time with shipping, it finally arrived monday. I waited until yesterday when i saw it prowling the cage at night to attempt to feed the snake, but it would not eat. I even brained it! The snake seemed interested(rapid flicking of the tongue),but nothing. I am trying again tonight with the cage covered. According to the person I purchased it from the snake has ate a total of 3 times, each including a f/t pinkie. If the snake was fed the day before it was shipped (i doubt it), it would be a week and a half since the last meal.
so should i be concerned or if it doesn't eat what is in there tonight just leave it alone for a week?