I don't know if this things are normal.

The symptoms you’re describing can be concerning and may require professional attention. It sounds like you’re experiencing a combination of physical, emotional, and cognitive changes that could suggest several possible issues. These could range from anxiety disorders, mood disorders such as bipolar disorder or depression, to other psychiatric conditions. The headaches, trouble sleeping, and uncontrolled emotions might signal a high stress level or anxiety. Sudden aggression and self-harming thoughts can be more serious indicators of emotional distress, and it’s important not to ignore them. The experience of being in a fantasy world, talking to oneself, or imagining conversations could be associated with dissociative tendencies or even psychosis, though these are not definitive diagnoses. Breathing uneasiness and increased fear are also common in anxiety disorders. It’s crucial to get a thorough evaluation by a healthcare professional to determine what exactly might be going on. They might recommend some psychological assessments or refer you to a mental health specialist. In the meantime, you can try some self-care measures such as maintaining a regular sleep schedule, engaging in physical activity, and practicing mindfulness or relaxation exercises. However, given the complexity and severity of some of these symptoms, please seek professional help to ensure you receive the proper care. If you ever feel like harming yourself or others, it’s critical to seek immediate help from a mental health crisis line or go to the nearest emergency room. Your safety is the most important priority right now.