This aspect is an strong indication of the importance of your current incarnation. Both Saturn and the nodes are karmic indicators in the chart; to have them together provides a powerful clue that your experiences, choices and relationships in this lifetime provide you with powerful opportunities to work off old karma, all the while avoiding new karma, unless it's positive. For this reason, it is important that you learn early on not to resist changes in your life.
If you make the correct decisions and strive to be the best person you can possibly be today, then tomorrow will take care of itself, and the correct path will naturally unfold before you, when you're on track. It may be a narrow road, but it will be there. You fear the future because you can't see it, not realizing that by demonstrating maturity and responsibility you are following the life path you're meant to take. Don't fear the future. Embrace it.