You might share your post on our Traumatic Brain Injury and Post Concussion Syndrome forum - others there may be going thru similar wc issues.
It is a fairly active forum -
http://neurotalk.psychcentral.com/forum92.html

If you have an wc atty they should do all or most of the official claim communicating for you.
Seems that wc should have sent a letter before stopping the payments.

Be sure to follow any restrictions by your doctors re the claim, esp if a higher paying case/claim they (wc) might be watching your activities.

[Are these tactics??]
YES!
They hope you will give up and just go back to work..even if you feel horrible.

See the useful sticky threads for more info on wc and how things proceed.

http://neurotalk.psychcentral.com/thread1117.html
http://neurotalk.psychcentral.com/thread124924.html