Hi, Leslie!   Oh, no!  I'm sorry to hear you misplaced your tickets!   Here is what I would do:   Call (407)W-DISNEY with any or all of this information:

-Date of purchase of the tickets
-Credit card you used to purchase the tickets
-Confirmation numbers given to you when you bought them
-Any receipts or emails

Hopefully they can help you.   In the future, I recommend making copies of the BACK of all your tickets as soon as you receive them and place this copy in a safe or a vacation file folder.  Write your name and cell phone number on the front of all tickets.  Always keep all receipts, and for regular tickets, keep track of how many days you have used.

Sending you pixie dust that this can all get resolved quickly for you!  Good luck!