There are five major Anxiety Disorders and it is not unusual for people to experience symptoms of more than one Anxiety Disorder at the same time.
Panic Disorder is the experience of spontaneous panic attacks.
It is not unusual for people to become fearful and chronically anxious about having another one. Traumatic Stress Disorder is the experience, or witness or confrontation with an event or events that involved actual or threatened death or serious injury or threat to the physical injury of self or others. This can include repetitive behaviours such as hand washing, cleaning, checking, counting, repeating words silently to themselves. The obsessions and compulsions can 'significantly' interfere with the person's everyday life and cause extreme distress. Generalised Anxiety Disorder is persistence and excessive anxiety or worry experienced for six months or more about events or activities which may or may not happen.