icando,

It sure sounds like anxiety/OCD to me. You say you have always been intelligent. This adds to your problem. Intelligent thinkers have a propensity to OCD and anxiety because their brains tend to pay attention to far more details than the average person. There is also a need to constantly understand every detail around them.

CTE is not a risk for you. But, since you learned about it, it will likely stay in your mind as an obsession.

In my experience, your OCD and anxiety issues create a risk of depression that can be far more life changing than any miniscule risk of CTE. Here is an interesting article for you to consider.
http://science.howstuffworks.com/lif...al-illness.htm
You would be better off learning how to control and slow down your thought processes than spending time worried about CTE or concussion related memory issues.

You may want to consider the job responsibilities you take on. Project/program length can also be a concern. Shorter term tasks, projects and programs will give your mind a chance to let go more frequently. Or, simply learning to break up your projects into shorter projects with intermediate goals can help.

Longer projects allow the OCD brain to spend a lot of time with all the details of the uncompleted parts of the project. As you said (especially when I am planning something, I often repetitively planning it and can not stop, and re-plan it again and again until I reached a good feeling that I can not explain , which intensify my tension headache)

Also, do your preliminary planning on paper. There is something about writing down thoughts that makes it easier to put those thoughts on the shelf or in a file. It also causes one to slow the thought process to the speed of the hand writing. Try it. You'll see what I mean. Juggling planning in the mind leaves those juggling balls in the mind.

And, stop researching concussions and such. You will not find anything to help you. There are no treatments, only learning how to manage life and symptoms. But, you symptoms are OCD/anxiety.