Hi Deana,
How awesome that you will be enjoying a wonderful time at Walt Disney World Resort this coming November. Summer will come and go in no time.
At this time, ten days is the maximum you can get for Theme Park Tickets. To extend your fun time, however, there are a few options, besides purchasing a 2-day additional Theme Park Tickets which you can do directly at the
Theme Park Tickets page. You can then add them to your My Disney Experience account and you should be able to book FastPass+ attractions up to 60 days before arrival.
One option which may or may not save you some money (depending on the ages of any children that may travel with you), is to upgrade to a
Disney Platinum Pass. This will give you some additional benefits, such as Disney PhotoPass Downloads. This lets you bring home all the memories that the
Disney PhotoPass Service photographers take. You also get some discounts on tours and merchandise. To upgrade, you would have to visit
Guest Relations right after you check-in to your hotel.
Another option, is to upgrade your Theme Park Tickets and add the Water Park Fun & More Option. You will get access to both Water Parks, as well as both Miniature Golf options. The option for you should only cost you about $26 per person, and you will have the same number of admissions as the number of days you currently have; in your case, ten!
Finally, my other suggestion is to simply enjoy your Resort hotel's pool or spend the day at Disney Springs. There's lots of options to eat, have fun and do a bit of shopping too.
Happy planning!
Ricardo.