Hey Shannon, Hope this makes you feel better..
My Birth Certificate was destroyed in a flood in 1977, I have a plastic card like a credit card issued by the Commonwealth of Virginia. I have been on 12 Carnival cruises over 14 years without any problem. I actually like it better at check in because while my cruisemates are fumbling for their paper certificates..I hand them my drivers license, birth card, and credit card all together..and I'm on my way! Hope this helps, and have a Wonderful Cruise!