I need your expertise, is fear of death an anxiety symptom..?

It can be. : Anxiety symptoms can include feeling nervous or irritable, muscle tension (especially in neck, shoulders ; back), poor quality or minimal sleep, lack of concentration ; easy fatiguability. Lump in throat or butterfly in stomach sensation can occur. Sometimes the worst thing about anxiety is the just not being able to put your finger on the reason that you feel that way. Arrange for a psychiatric.

Fear/death: Fear of death is probably the number one reported fear in the general populace. The question is how intense is your fear and how much time does it take up and interfere with your life? It may be quite substantial as you were asking about it. These types of issues usually need to be sorted out through conversation or dialogue with some trusted confident a pastor a therapist a good friend.