mae-7,

Your anxiety is common to PCS. The repeating of thoughts are just a subset of the anxiety you are experiencing. You need something to do to occupy your mind in a simple, non-stressful way to help prevent the obsessive/repeating thoughts.

chitown's food recommendations are a good start except, avoid any soy based protein. You should also add some serious B-6, B-12 and B complex vitamins plus all of the anti-oxidants. Avoid caffeine and alcohol except for one serving per day max.

And, find a way to chill out. Anxiety is the worst thing you can do for PCS.

And, seriously rethink you plan to return to Judo. You brain will not tolerate another impact. If you think you are having a hard time now. Try getting another impact and developing Multiple Impact Syndrome with the permanent PCS that goes with it.

It is very likely you have suffered many "sub-concussive" impacts during your Judo training. These head impact that did not cause any concussion symptoms are just as damaging because they are repeated in a close time span. They set your brain up for a much more damaging result from the single concussive impact.

If there is one thing to worry about, it is that another impact will likely cause much more damage with likely permanent symptoms. But, you can make life changes to reduce this risk of another impact. Bike helmets help but not as much as expected, especially for the previously concussed brain.

Now, make some good choices, try to relax, and give you brain plenty of time to recover.

My best to you.