It's important to recognize that everyone's emotional responses are unique, and there's a wide range of normal when it comes to emotions and how we process them. Not getting angry very easily and being able to work things out in your head can be positive traits, as it can lead to better problem-solving and a more balanced emotional state.
However, it is concerning that you mentioned hitting yourself in the head as a way to calm down when little things set you off. Resorting to self-harm as a coping mechanism is not a healthy or safe way to handle emotions. It's essential to find healthier coping strategies to manage your emotions and stress.
Consider seeking support from friends, family, or a mental health professional to explore why these little things are causing such a strong reaction. Learning healthier ways to cope with emotions, like deep breathing exercises, mindfulness, physical activity, or talking to someone you trust, can be beneficial.
If you find it challenging to control your reactions to certain triggers, it may be a good idea to consult a mental health professional. They can help you better understand your emotional responses and provide appropriate strategies and tools to manage your emotions effectively. Remember, seeking help is a sign of strength, and it can lead to personal growth and improved emotional well-being.