Yes, is on the 10th. cruise. I would follow LHP's advice and check your profile now. Mine was messed up once with 2 Past Guest numbers. If everything is in order it should be no problem.
Before they had everything online, and stated like they do now, I went on my 10th cruise. I was a bit concerned if they had gotten my Past Guest numbers straightened out. They kept the cards in a separate area then that you went to after checking in. I remember saying "please let this be a Platinum card" when it was my turn. The guy handing out the cards started grinning real big, and said.. "Yes, Mr.*****, I have a Platinum card for you." I was so thrilled.
Congratulations, on your 30th anniversary and your 10th Carnival cruise.