muktown,
Welcome to NeuroTalk. Sorry to hear of your struggles.
You may need some work on your upper neck. A
www.nucca.org upper cervical chiropractor may be able to help.
Remember that not all chiros are created equal. The twist and pop neck adjusting is often too aggressive. There are also some diagnosis systems that identify vertebral problems better than others. I find Leg Check to be a good diagnostic system.
Your tingling sounds like a nerve issue. The neuro may do a EMG (ElectroMyloGram) or NCG (Nerve Conduction Study). These can measure the signal going up your nerves.
Your headaches, slurred speech, memory loss and other PCS symptoms need more rest and quiet. School may be too much stimulation.
Many of us get improvement from nutritional supplements. B-12, a B-50 or B-100 complex, D3, Omega 3's, and all of the anti-oxidants. The improvement is slow because the brain need to first detoxify before it can start to heal.
Let us know how we can help. There are lots of great people here.
My best to you.