On one hand, you applied to A&S so the die is cast. On the other hand, you can still take up to 8 courses in CSOM as an A&S student anyway, so you can cherry-pick a good course sequence without taking some CSOM core classes you may not be too interested in. I think jpm50 nailed it by saying A&S is an awesome school. You’ll be just fine. Good luck to you!