Hey Jood (sorry, VERY bad pun),
It may depend what surgery you had. I had mx, ANC and immediate LD recon, and I was back driving after six weeks, which is pretty typical. My nurses said the best thing to do was go and sit in my car, strap in (that can be painful in itself) and go through the motions - so gear changes, opening windows, turning round as if to reverse, fake emergency stop, etc. If you can do these things OK, then you are probably ready to go back to driving. I found to start with I only wanted to do short journeys as my confidence was affected, and for me it was reachig out of the window to take tickets from machines in car parks that hurt most!
It is worth chekcing your insurance details thoguh, because if you drive before the date the medics say you can, your policy may be invalid if you have a shunt, even if it's some numpty who hits you...
Hope that helps and you are soon mobile.