You'll definately need to call the Dr if it doesn't pass by Monday. You'll have to go in for an x-ray to find out if it passed and you didn't notice, or if it's stuck.
I'm a Crohnie with a non-functioning j-pouch because I've got an ileostomy (due to peri-anal abcess), and I swallowed mine in Dec, it got stuck, then somehow (fistula we think) bypassed the ileostomy and ended up in the J-pouch that I have. I finally had it removed during a scope in May.
I know that Dave will probably come along sometime too, his never passed, and ended up (WORSE CASE SCENARIO) causing problems a few years later where he had to have surgery.
So, like I said, please call the Dr on Monday and have them do an x-ray to see if it's still in there!!!
Hope all goes well.