What Perna is still true even with the program you are in. I've had peers go through similarly intensive arts programs...and the first year is still an introduction to a wide variety in the field, THEN you narrow down. Professors are still confident/arrogant enough to teach you more because you are now entering a different level. You will also still need to take some basic courses in English and Psychology, which will help in courses you would take after and can be transferable. Most universities are nice like that in still giving transfer credit if you do change your mind.

Beyond that, you don't have to struggle alone, or that you are all alone with your feelings and concerns too. So I second everyone else's suggestion to talk to a counsellor (guidance, academic, personal etc...) for support and some feedback on your options. Also know that being afraid at this stage is ok, yet you probably have a lot of potential and talent too, to get accepted still beyond all that competition. Don't give up...