Find yourself a really good psychologist with a special interest in cognitive-behavioural therapy (CBT). Perhaps a psychologist who specialises in helping sportsmen overcome similar sorts of problems would be the ticket. This is no different to a top-class athelete feeling stressed out before the Olympics or the US Open. The golf guys go through this all the time.
This is a very common problem and can be helped remarkably easily through the application of some very pragmatic cognitive behavioural techniques which you can do yourself. We're not talking major psychotherapy or drugs here, just simple, useful stuff.
That would be my first port of call.
Good luck!
QDM