Alcoholism Recovery & Treatment

I’ve been on probation for six months now, half of my probation sentence for a dui, and I’m just wondering how often my color will be called for random screening, and how to go about getting my probation mitigated.
The reason I’m asking is not because I’m worried about passing the tests, but because it costs me a lot of lost time at work to take them. And I’m the sole provider for my son, so every hour counts.
I started the probation six months ago, and I had to do drug and alcohol counseling, as well as an assessment to determine my addiction level. When the assessment came back with the results saying that I needed no further treatment, my P.O. got pissed, and decided to assign me a color for random testing. This woman has not liked me from the moment I set foot in her office. She threatened to lock me up for V.O.P. when she found out I was taking cough syrup, for a cold, and I wasn’t sure if it contained alcohol. I’ve never been in any trouble with the law before, so if I don’t understand what she’s talking about and ask her a question, I get bitched at and threatened some more.
I have all my fines paid off, I’ve satisfied everything the court has asked of me, except the last six months of this probation. That is why I’m curious how to go about mitigating it.