The previous school year has been full on and when I look back I feel so anxious towards the future. I feel so restless and panicky just by looking over the previous year and insecure thoughts start to go through my head about my work and friends. Change really frightens me. What can I do?
It sounds like you're a comfort-zone kind of person. I am too.
The best thing to do, to keep yourself acclimatized, is get out of that comfort zone regularly. Make little changes to your routine or environment occasionally. That way you won't freak out when change happens sometimes. BUT, keep something, even if it's small, to be a "transition object". Haha! I've had a dream catcher, since birth, and it makes wherever I am feel like home and it calms me. Find something like that, that makes you feel a familiarity.
Change is going to be a factor in your life for all of your life.
It's important therefore that you learn to deal with change, in a healthy and productive manner.
It might help if you spent some time looking back over your life, and making a list of times and situations where-in you encountered change, particularly change which was beyond your control. And write down how you handled it, what your worst fears about that change wear, and what was the worst thing that actually happened.
You should learn from this exercise that 1) you're already adapt at dealing with change 2) your worst fears almost never materialise. You have a tendency to fear the worst possible outcome, and never rationally realize that the odds against that outcome are so vanishingly small.