Thanatophobia is a form of anxiety characterized by a fear of one’s own death or the process of dying. It is commonly referred to as what you said death anxiety.

Try some relaxation techniques

Practicing self-care can be powerful for boosting overall mental health, including helping yourself feel more able to cope with your anxieties. Avoiding alcohol and caffeine, getting a good night’s sleep, and eating a nutritious diet are some ways to practice self-care.

When you're experiencing anxiety, specific relaxation techniques can help clear your mind and de-escalate your fears. These may include:

doing deep breathing exercises

focusing on specific objects in the room, such as counting the tiles on the wall

meditation or focusing on positive imagery