Humm.. I was also looking for some options B before, if I didn't get into med schools and I had a similar view from what you had. You can either stay in undergrad for another year (I don't know what that does to your financial aid and scholarship, but it is possible, maybe your parents will help?). I think that a more pausible way is to go to grad school at your institution because grad students are usually paid, and this way you don't have to worry about them cutting your scholarship or financial aid. You can always do research at your university, but since you don't want to work, I just don't know your other options. Or you can go travel through TEFL programs (Teaching English as Foreign Language). One that I was specially looking at is a program in Spain, the earn is not great, but you can definetly make a living after the inicial investment to get certified. They guarantee you a 15 hour / week part-time job (which leaves a lot of time for Europe travelling), but it's only for a semester. And if you want to visit Thailand, you can spend the other semester teaching TEFL there ( they pay much better for TEFL teachers )
http://www.canterburytefl.com/
Also, you might want to consider studying abroad if you parents are willing to pay for you. Or you can volunteer abroad, but most are usually paid, unless you join peace corps or get into a mission trip. Either way, there are lots of options to enjoy your youth before going into medical school!