If you aren't enrolled in spring, you don't get financial aid. If the financial aid for fall has already been applied to your account, and you're taking classes, it's over and done with and they can't take it back. But you WILL have to repay it along with however else much you've taken out once you're out of school for 6 months.

Or, you can be like me and stay in forbearance till you die. I don't recommend it.