You will be okay! Taking risks always causes some panic/anxiety to come to the surface and you are taking a risk...a good one that I think will be worth it in the long run. You are stepping outside of your comfort zone right now and your body is trying to convince you to go back to your safety, but panic cannot hurt you, so there is no reason to go back, keep moving forward. Let the panic be there, it probably will for a while anyway, especially since you are doubting your decision right now, but I think in time that you will calm down and this will become a huge step in the right direction. You should be extremely proud of yourself for taking this step and for staying during orientation!!! Take things slowly and try to let the panic come if it wants too, but don't give up...I think you'll regret that decision more than going to school and handling the anxiety it may bring. Hang in there, you'll make it! I really do wish you all the best with this. Let me know how things go!