You searched for: “fluster
fluster, frustrate
fluster (FLUS tuhr) (verb)
To make someone nervous and confused: Sudden, loud noises can fluster a speaker.
frustrate (FRUS trayt") (verb)
To cause someone to feel angry, discouraged, or upset because of not being able to do something: So many incomprehensible bureaucratic letters can only frustrate people who want to improve the economic situation.

Getting lost when driving always seems to frustrate Jill very much. In fact, it tends to fluster her so much that she has to take a break for a coffee.