I have already accepted an amount for fall 2012-spring 2013.

Spring 2013 is going to require more than I am going to be getting. I was awarded more in the beginning; but I chose to take less. Can I get more on the same loan, or do I have to take out another?

It may still be possible to increase the amount of your award, since you were originally eligible for more. To do so, you'll need to contact your school's financial aid office for next steps.

If that doesn't help, another option would be to look into private loans.