Hey Jas,
It may be that you haven't ate enough and/or the vicodin slowed you down a little. Is there anything you eat that usually stimulates a bm. For example- some people can take just a sip of coffee and need to go...
My packing was just pressed against the outside. Did you get any post-op instructions about bm's and what to take if it didn't happen in a certain amount of time? If you normally have bm's every day, then I would definitely call the CRS and see if they feel this has been too long since the bm. You don't want to get constipated.
Don't stress too much though, it may just be your digestive system has slowed down a little...