Recently diagnosed with gestational diabetes

Was recently diagnosed well I went out and bought myself a meter. To check my levels til I see the dietitian next week. Anyways Iv been eating normal what I normally eat and none my numbers have been high they all been in range even when I ate cheesecake after dinner yesterday. So I messaged my nurse at my obs office and asked if I could retest the 3hr I straight up told them that I don’t think I have it