Jamie,
Your best bet is to contact a
solicitor for drink driving. You shouldn't have to pay anything for enquiring and once the solicitor understands your particular situation, he should be able to tell you the fees he will be charging for this.
For simple cases where you have committed 1 drink driving offence and have been banned for 3 years, you would be able to get your licence back after 2 years if you have had a clean driving history since the offence. However in your case, you have 2 offences for DD and that's where things get complicated and only a drink driving specialist would be able to advise you properly on the choices that you have.