Welcome to the forum - there are a lot of good people on here with a huge amount of information to share.
I had a trip myself in January this year and all I can say it was a life changing event and To be honest I am surprised you have been able to do so much post injury. Also impressed that you could return to work as an accountant with your injuries and symptoms - but hey everyone is different
You may have come across Headway in the UK - these are probably one of the best sources in the UK. There is a good list on this link
http://www.channel4.com/health//micr...rain_help.html
The main advice from every one seems to be rest, healthy diet and avoid PC's and high intensity video