Panic is a sudden sensation of fear, which is so strong as to dominate or prevent reason and logical thinking, replacing it with overwhelming feelings of anxiety and frantic agitation consistent with an animalistic fight-or-flight reaction.
You can access more information and support from the following organisations:
Anxiety UK is a user-led organisation, run by people with experience of living with anxiety, stress or anxiety-based depression
No Panic is a registered charity which helps people who suffer from Panic Attacks, Phobias, Obsessive Compulsive Disorders and other related anxiety disorders.
You may also benefit from these three self help guides:
You could also have a read of these self-help books - click on the cover for a preview on Google Books: