Bad / Nervous
perturbed - Feeling unsettled, anxious, or troubled due to confusion, concern, or disruption.
falter - To lose strength or momentum; to weaken or stumble; to hesitate in action, purpose, or speech.
vacillate - To waver between different opinions or actions; to be indecisive.
shock - A jarring event that causes surprise, disbelief, or emotional disturbance.
temperamental - Liable to sudden changes in mood or behavior; unpredictable in temperament.
insecure - Lacking confidence or self-assurance; feeling unsure about oneself.
tenterhooks - Waiting nervously for something to happen.
stutter - To speak with involuntary disruptions or repetitions of sounds, often at the beginning of words, due to a speech difficulty.
unnerving - Disturbing or upsetting in a way that makes someone feel anxious or afraid, sometimes leading to a loss of courage, confidence, or composure.
qualms - A feeling of discomfort or uneasiness, often related to a decision.
touchy - Easily offended or sensitive to criticism or comments.
stickler - Someone who is very particular or fussy about a specific thing.