DUI at the age of fifty-seven?

Got pulled over for failing to stay lanes and then the no alcohol at all did a sobriety test but failed the walking test that I have a slot of medical issues and was then arrested and blood is taken charge says that excessive alcohol does not know whether or not that matters. I take a lot of drugs, and that day I might have overdone it. What am I watching? I can’t lose my license to keep my grandbabies and pick them up from school during the day. And does it matter that they say they abuse alcohol instead of drugs? After four hours without a bond, they let me go