Mate, so long as you cop it sweet, shut up about it and never (repeat never) do it again you should survive with no real dramas. It will muck you up short term but long term it shouldn't hurt you as long as you never do it again. But I repeat... don't talk about it unless asked for in an interview.
Good luck
PS, my brother drank and drove. They (paramedics)cut him out of the wreck alive. Hence my empathy and support. He's not an agent of the devil, he made a very bad call when he was young (ie 20). He paid the price and he'll carry those scars (on his leg) to the grave. He cannot walk without pain ever..... (this is for those who think that I don't understand the seriousness of drink driving - I do)