One thing that helps me with such stress is remembering that it doesn't have to be done all at once. Don't get ahead of yourself, worrying about paying off loans before you even finish your schooling. I think of it kind of like worrying about graduating and getting a job when I'm only a freshman :-) Time and work and our own efforts change things so there's no reason to worry about the "future" as we can't possibly know what it will look like; we're not there yet. Only work to solve the problems in front of you now.

Congratulations on putting together a scholarship and loan package so you can go to school for the next year; that in itself is a great accomplishment! Give yourself credit for that and then concentrate on learning the material you're presented during this next year. It's all right to imagine how things will be, what information you might need to learn but it's not all right to worry about it. Just do the best you can right now and let the future with its new/different problems arrive when it does, a day at a time.