fasfa money?

Does anyone know anything about fasfa? I filled out the form online the day it opened and I got an email saying it was complete and everything. I got a letter from my school telling me how to get my refund. It didn't make since until about a month later when I reread it then I signed up right away to receive my refund through the mail. Now classes start next week and i have textbooks to buy and nothing. I've looked all over the website(s) and my school website and I can't find anything on it. What do i do?!?!?!?