The SCAT2 is not reliable since it relies on self-reporting. The dementia test will hopefully be a MMSE (Mini Mental Status Exam). It is a good start. You could check out ImPACTtest.com to see if you can get an ImPACT done locally. Many high schools and colleges use the system. They sometimes contract with a local sports med clinic to oversee the ImPACT test. Also, look for a local concussion clinic. They may be able to test you.

I do not consider the above tests reliable at saying you are healed but they are good indicators of ongoing struggles.

Have you been checked out for an upper neck injury ? Your symptoms could be made worse by an upper neck injury.

My best to you.