A careful audiologist will do vertebral artery testing prior to Hall-Pike testing. You lean forward, drop your head forward and turn your head to the right and count backwards. The head and neck position can cause restriction to blood flow that will cause mental confusion. I have problems with my head forward and tipped to the left. The audiologist I was talking with said it is not uncommon.

There is a doppler ultrasound that can look at blood flow. You would likely need to turn/tip your head to cause a differential. The MRA was in a straight head/neck position so it would not always show abnormalties.

I encourage you to try to sleep on your back with a straight head and neck position. I learned by sleeping in a recliner chair until I could learn to do it in bed. My sleep in this position was much better than in bed. An adjustable bed like hospitals use makes it easy to sleep in a better position.

My days after these good nights is much better.

I recently started trying to sleep on my side and my stressful dreams and lousy days came back.

If your job requires looking up and down, you would do well to reduce that as much as possible. It could be part of your falling problem.

If your attorney is not an expert in mild brain injury, he would be wise to check out http://tbilaw.com and http://subtlebraininjury.com. It takes an expert to represent someone whose imaging and other common diagnostics show nothing is wrong.

My best to you.