Welcome to planDisney, Jennifer! I'm always so glad to be able to answer a question for a fellow Texan. With your trip less than a week away, it's a great idea to solidify how you're going to use your
tickets, and I'm happy to chat with you about what you're able to do with them.
Jennifer, each Guest can only use one ticket per day. If you want to visit two Theme Parks, you must have a ticket with the Park Hopper option, as you won't be able to use two days of your multi-day ticket to visit both
Magic Kingdom Park and
EPCOT on the same day. I do have a solution for you, though! You can upgrade your ticket with the Park Hopper option at any time during your stay. As long as you have days left on your ticket, you can upgrade the remaining days with the Park Hopper option, as long as you have at least one active day left! If you save your Park Hopping day for the end of your trip, you will be able to upgrade your ticket for the minimum cost, so it's definitely something to consider. If this is something you're interested in, you can visit any
Guest Relations location or a ticket window and they will help you figure out what you want to do.
I hope this answers your question, Jennifer, and please let us know if there's anything else we can do to help you plan your magical vacation!
Jessica