Gestational diabetes question

So I was recently diagnosed with gestational diabetes about a walk and a half ago and I have been tracking my numbers for a week with no change at all to my diet. All of my numbers have been way under the levels they want me at. I went to the nutritionist though and she still put me on a super strict diet. My question is, is it really necessary to change how I am eating that much if my numbers are that good to begin with? I see my OB tomorrow and will speak to her about it, just curious to get other opinions.