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.
Mark in Idaho
58 years old, retired due to disability, married 33 years, father of three, grandfather of four, Suffered a serious concussion at 10 years old (1965) stopped most driving after last concussion at 46 years old (2001), Post Concussion Syndrome/Multiple Concussion/Impact Syndrome with PTSD, immediate and short term visual and auditory memory problems, slowed processing speed, visual and auditory processing difficulties, insomnia, absence seizures, OCD, 14 concussions since first concussion at 8 years old, Taking paroxetine for 14 years and gabapentin for 12 years. Added L-Tryptophan and successfully stopped all paroxetine after 3 months of tapering down
"Be Still and Know That I am God" Psalm 46:10