Mark, you booked the cruise on your own not with your TA, correct??
IF it would put your mind at ease, by all means call the cruise line, all you need is your booking number. Technically, as Mike said you don't need documents to board the ship, all your info is in the system. IF you don't get your docs all you would need to do when you arrive at the pier, go to one of the porters and get the correct luggage tags for your checked baggage, and then go into the terminal and check in.