Nervous and worried.
Having a feeling of anxiety or disquietude; extremely concerned, especially about something that will happen in the future or that is unknown.
Earnestly desirous.
Accompanied with, or causing, anxiety; worrying.
Having difficulty breathing; gasping.
Having no wind; still, calm or airless.
Having a somewhat hysterical tone, using over-emotive language.
Not breathing; dead or apparently so.
That makes one hold one's breath (with excitement etc.).