Is there a word to describe the emotional state of being simultaneously excited about the prospect of something and dreading the prospect of it not happening? The closest thing I can think of is "disappointment" but I don't think that covers a future tense hypothetical.
The use of the word would be something like:
"I am excited because I think they're going to offer me the job but I'm worried that they won't."
Would transform to:
I am (word or phrase) about the job offer.