I know this will be hard, but the best thing to do will be to say how nervous you are. Usually at interviews the first question you'll get asked is to say a little about yourself, so just say you're feeling a bit nervous - people like that cos it shows your taking it seriously. Also once people know your anxious they'll want to help. You've got over anxiety in the past you can do it today. Just breathe nice and slow and think of all those lovely dogs that are waiting for YOU to come and take care of them. Those doggies need you. Good luck.