Worries: I won't be accepted. No acceptances/rejections in my field yet, but I am so nervous I can't even focus at work. I worry that my lack of experience will hurt me. I am straight out of undergrad and most people I see getting in have years of relevant experience and then there's me.
Excitement: I discovered Human Computer Interaction during my undergrad and the opportunity to learn more about it literally makes me giddy.