Boydo,
I hope you son is OK after your fall. Neither of you can afford another fall.
It sounds like you need to be speaking with a Work Comp attorney about protecting your job and getting disability. You don't say what state you are in so we can try to find a referral for you. You can check
www.tbilaw.com . There are others who have good experience in mTBI. You sound like a walking drug factory. Are the meds just for head ache and insomnia ? Tylenol (acetaminophen) is rough on the brain besides the liver.
Have you tried the Vitamin and Supplement regimen in the sticky at the top ? Your brain needs help to be healthy besides pharmaceuticals. Omega 3 DHA should be at the top of your list.
My best to you.