Thanks, I already supposed that but it is always a great help to have it confirmed by someone who undertstand this kind of things.

I'd say anxiety also. For something blunt to cause damage would have to be either an intentional act or some sort of accident.

Bud

Since when I stopped having neurological and cognitive symptoms almost 3 months ago I started having sleep disorders, to be specific I started to have fractured sleep.
I sleep 2-5 hours every 6-8 hours instead of having a regular sleep pattern.
What can the cause be? Could it be sleep apnea?

Also, it's risky for me to use a clipper to cut my beard, moustache or hair?

There is no risk of using clippers. The previous event was likely a stimulation issue, not a physical vibration/movement issue. The sound can be just the wrong frequency that resonated into your ear. The reaction is a anxiety / fight or flight or freeze response.

Stop sleeping during the day and your night time normal sleep will improve. Some need some food in the system shortly before going to bed to energize the brain so it can sleep. REM sleep uses a lot of energy. It is when neuronal healing/repair occurs.

If you feel tired during the day, it is usually because you are not getting quality sleep during the night. If somebody can observe your sleep during the night, they may notice breathing issues. You can buy a recording pulse-oximeter that reports to a smart phone to track oxygen levels and pulse. It can be helpful at understanding sleep issues. A FitBit will track movement and pulse.

Can a sound cause a setback of symptoms?
How is it possible?

I also started having neck pain (and an electric sensation going up to my spine) along with the trouble thinking when I used the clipper for the beard the previous time, is it possible for a sound to cause that too?

Thanks for the advices, I will try to improve my sleep pattern by following what your suggestion.

Danielson, I was also in a car accident and sustained neck whip lash without head trauma. I can tell you from my personal experience the shortness of breath and a pressure on your chest can be caused by anxiety. I've had almost every test done you can think of and the results always came back negative for any problems. It's been 2 years since my accident and thankfully my condition hasn't gotten any worse but I have seen an improvement over that time frame even if progress has been minimal.

Thanks a lot for the information, and I'm sorry for what happened to you, you have my solidarity and empathy.
If it's not a problem for you, may I know the speed and the mechanics of your accident (it was a front o rear collision, were you wearing a seatbelt etc...)
Also, what kind of symptoms have you experienced after the accident and what are your current symptoms?