Do not plead guilty or otherwise resolve your case tomorrow. The breath test could be suppressed in certain instances and, if you performed well in your other interactions with the police officer, you may have a triable case. That means no extended license loss, no probation, no surcharge, no record, etc.
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If your case has not reached a final judgment then your lawyer is still the attorney of record on the case. If you don't want that attorney representing you any longer then request that he or she file a motion to withdraw or mark it up yourself with notice to your attorney and your former spouse. You can then seek to modify the decision by yourself or with new counsel.