All of the symptoms you have sound like Post Concussion Syndrome. Your recovery after quiet rest is also a PCS sign. You will be more likely to have longer lasting recovery from weeks of quiet rest. Each time you relapse, it breaks the chain of quiet rest and you lose the value of the recovery.

It takes weeks of sustained quiet rest and a slow return to activity to get recovery to last. It also helps to understand all of your triggers so you can moderate them. Consuming more fiber will help the bowel movements to be less stressful.

You may have damaged the blood vessels to that portion of your brain. Until they heal, any change in blood pressure (stress) can cause symptoms. The myriad of causes that can be effecting your are vast. Only you can narrow down these causes.

My best to you.