• apprehensively, hectically, restlessly, uneasily
• to cause misgivings, to disconcert, to disease, to disquiet, to distract, to fidget, to flurry, to flutter, to fret, to harry, to intrigue, to puzzle, to trouble
• agitation, apprehension, commotion, concern, disquiet, disquietude, distraction, emotion, ferment, fluster, flutter, fret, misgiving, puzzlement, restlessness, turmoil, uneasiness, unrest
• disconcerting, disquieting, disturbing, galling, unnerving, upsetting, vexing
• to be worried, to bother, to fluster, to jib, to trouble, to worry
• to be ill at ease about sg, to worry about sg, to worry over sg
• don't trouble about it!