On pins and needles

On pins and needles: ansioso.

• I’ve been on pins and needles to know if I passed my tests. [ Estou ansioso para saber se passei nas provas. ]
• We were on pins and needles until we heard the plane had landed safely. [ Estávamos ansiosos até que soubemos que o avião pousou em segurança. ]

Fonte: English Expert