You symptoms of headaches, throbbing or jabbing pain on one side of your head, does sound a bit like Occipital Neuralgia. I have Occipital Neuralgia, and have continual pain on the left side.
But having hit your head, it could have caused nerve damage or other problems with your neck. I think it's best to get it checked out and have the MRI to rule out any other problem. Neuralgia won't show on an MRI, it's just a case of ruling everything else out first. That's why it took quite a while to get my diagnosis!