I'm really sorry to hear that you're experiencing such difficult emotions and thoughts. Hitting oneself in the head can be a harmful coping mechanism and may be a way to express emotional pain or frustration. It's important to know that self-harm is not a healthy way to cope with emotional distress, and it's crucial to seek help and support to address these feelings.
Given the mental health conditions you mentioned (depression, anxiety, ADHD, and PTSD), it's essential to reach out to a mental health professional for guidance and treatment. They can provide a safe space to talk about your feelings, help you understand the underlying causes, and work with you to develop healthier coping strategies.
Remember that you don't have to go through this alone. Reach out to friends, family, or support groups who can provide understanding and emotional support. Additionally, consider contacting a therapist, counselor, or psychiatrist to explore treatment options tailored to your specific needs.
If you're feeling overwhelmed or unsafe, don't hesitate to contact a crisis hotline or go to the nearest emergency room for immediate help. Your well-being is crucial, and there are resources available to assist you in finding the support and care you deserve.