I would suggest you make an appointment with a DV counselor to make a safety plan. When you go to court, you can ask for mandatory treatment, but don't try to lie for him to get him off the hook. The story you told us is the truth, and whatever the consequences for him, do not allow him to deprive you of your right to speak the truth.
And screw the breathalyzer. It's all about his behavior. Whether he is drinking or not, if his behavior crosses the line you have the right to protect yourself physically and emotionally.
Hugs, please keep yourself safe.