If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

Generalized Anxiety Disorder

b.panic disorder.

Explanation:

Panic disorder is an anxiety disorder in which the affected person suffers repeated sudden attacks of terror in the absence of external stimuli that can trigger them. Frequent episodes of terror accompanied by a strong state of anxiety are called panic attacks or, in some cases, anxiety attacks or anxiety attacks.

According to the NIMH, panic disorder is an anxiety disorder characterized by unexpected and repeated episodes of intense fear accompanied by physical symptoms that may include chest pain, rapid heart palpitations, shortness of breath, dizziness, anguish or discomfort abdominal.