ugh!! what to do?

So I followed the gestational diabetes diet like I was told last week, keep records of food intake and sugars. Today I went in for a follow up and lost 5lbs and they are concerned because I'm not taking in enough calories. Ok well I did what you told me what do you want me to do now!!!!! So now I'm increased on carbs and have another follow up next week but dang it people make up your minds!!!!! Ugh so freaking frustrating