WEIRD!!!!
You are exactly where I am except I feel worse when I do anything that raises my heartbeat. I decided about three months ago that I am going to do what I want as long as I won't hit my head again. I still don't do as much because felling like I am going to fall down, and a headache that makes me feel like my head is going to explode are not very exciting to me. But I want to live life and I am tired of being an "invalid" because of a headache. Nothing makes me better and even a bright light or a loud sound can or just waking up can give me a headache, so I decided to live life despite the pain. Go for it, it's not like anything worse will happen!