It sounds like you are experiencing some intense and distressing dreams that are impacting your waking life. Dreaming about hurting someone, especially someone close to you like a roommate, can often symbolize repressed emotions or conflicts that you may not be fully aware of. Your mind might be processing feelings of anger, frustration, or even guilt that you haven't addressed in your waking life.

The physical symptoms you're describing, such as headaches and hallucinations, might indicate that you're feeling overwhelmed or stressed. Dreams that leave you feeling agitated can be a sign that there are unresolved issues or emotions that need your attention.

Here are a few insights and suggestions:

1. Reflect on Your Emotions: Consider what might be causing these feelings in your waking life. Are there unresolved conflicts or emotions that you need to address? Journaling your thoughts and feelings might help to clarify these issues.
2. Manage Stress: Incorporating stress-reduction techniques such as meditation, deep breathing exercises, or even physical activity could help alleviate some of the tension you are experiencing.
3. Discuss with Someone: If you feel comfortable, talking to your roommate about your dreams and feelings could help clear the air and strengthen your relationship. Open communication can often reduce tension.
4. Seek Professional Help: If these dreams and symptoms persist, it might be beneficial to consult with a mental health professional who can provide guidance and support tailored to your situation.

Remember, dreams can often be a reflection of our subconscious mind trying to communicate something important. Taking the time to understand and process these feelings can be a significant step towards feeling more at peace.