Hey Don,
A slight displacement of your top cervical vertebra as the result of your fall may explain your pains.
If you like, Google for 'Atlas adjustment'. On Youtube you'll find a video that explains this when you look for the combination of these words 'atlas orthogonal correction'.
I hop this may help you, best of luck.
Steven
I also feel very irritable all the time. They said at the hospital at the time that the CT scan came out good. They gave me Vicodin for the pain 10mg every 4 hours. The nausea feeling goes away when i take the vicodin but i am also afraid that i will get addicted to them.