with one's heart in one's mouth
IN ALARM, in fear, fearfully, apprehensively, on edge, with trepidation, in suspense, in a cold sweat, with bated breath, on tenterhooks, with butterflies in one's stomach, in a state, in a stew, in a sweat, having kittens, in a twit

[TahlilGaran] Dictionary of Contemporary English ▲