I agree with etype, the worst thing for you would be to not drive. My mum passed her test over 10 years ago but has still only ever driven 4 or 5 times because when she passed her test she was so afraid that she put it off and she never started straight away. I passed my test in 97 and you couldn't stop me driving once I'd passed, it all depends on the individual.
The examiner had faith in your ability thats why he/she passed you so it's only your confidence that's lacking. I suggest for starters taking several either early morning or late night drives, the roads aren't that busy then and you can practice whatever it is thats making you nervous, if it's other drivers try less peak times like between 10 & 11 or 2 &3. Good luck x