Hi Donna,
I wish I had better news. From the
Tickets page of the Walt Disney World web site:
"All tickets and options are nontransferable and nonrefundable and exclude activities/events
separately priced. Water Parks subject to rehabilitation, seasonal and weather closures."
If you purchased the Water Park Fun & More option, that will expire with your tickets fourteen days from the first use of the tickets. There is good news if you have a separate Water Park ticket. A Water Park ticket will not expire. If you don't use the Water Park ticket on this vacation, perhaps you can save it for your next Walt Disney World vacation!
Thanks for stopping by the Disney Parks Moms Panel. Be sure to let us know if we can help you with any other questions!
Wishing you a magical vacation,
Amy H