###Human: I keep thinking about when will I die. I am stressed to the core. Please help. ###Assistant: Hello. I can understand your situation. For you, this trouble could be heartbreaking. You need to understand what is anxiety and what is a panic attack. Anxiety is the body's natural defence mechanism. Without anxiety and related reflex action, our body cannot function properly. Your panic attack is based on an underlying anxiety disorder. You need to know what is your anxiety disorder. If you provide more details, I will be able to diagnose your proper basic underlying anxiety. You are worried about the panic attack symptoms. You are worried whether the same symptoms will come again. This also is natural. Every one will do so. But, there is nothing to worry. The repeated thinking here actually is expecting the panic attack and that is called obsession. Obsession brings anxiety and apprehension.You need to read a lot of articles about anxiety and panic attacks. Understanding them will ease your doubts. As a treatment measure, I will suggest rigorous exercise, engaging yourself in creative activities, engaging in hobbies, always being with friends or family members, concentrate more on education or career, etc. Take care.