Fear is a signal function and the body’s response to prepare for a dangerous situation. There are three reactions to fear: fight, flight, or freeze. In itself a good mechanism. However, it becomes a problem when an anxiety disorder starts to hinder your daily life.
A panic attack is a very sudden (often unexpected) attack of intense fear. Panic attacks are very frightening, so much so that you develop a strong anxiety of the fear.
Anxiety and panic disorders can generally be treated well. Don’t hesitate and get help.