I'd give it the "sniff" test. If the packaging is sealed tight it should be O.K. for a few days when thawed. But if you don't want to cook it for a few days yet . . . I think I would go ahead and cook it now if it seems O.K. and it's been thawed for a few days already.
Keep in mind that many - if not all - supermarket turkeys marketed as "fresh" have actually been "chilled" to a degree where they are at least semi-frozen. They are then completely thawed & sold as "fresh", with quite a long "sell by" date. This has been a back-&-forth bone of contention with the USDA for quite a while.
So while you've already cooked your bird & enjoyed it, if this ever happens again, don't despair - it will be fine.