I am getting very frustrated with my OB doctor and need some outside perspective.

I am 20 weeks pregnant and was diagnosed with gestational diabetes at 14 weeks. This is my 3rd pregnancy but my 1st time with gd. I have been monitoring my blood sugar for 3.5 weeks now and my numbers are good after eating but my fasting number is always very high. It is supposed to be under 95 and it is between 105 and 120 everyday. I've tried adjusting my evening snack and haven't had any success with bringing the number below 105.

I called my OB and left a message with the nurse Thursday reporting this and asking what I should do since I don't have an appointment for another 2 weeks. It is now Monday and I still haven't gotten a return call. Honestly I don't know how serious my numbers are but I am getting pretty pissed that nobody has called me back. I know that my doctor's long-time nurse left and he was hiring someone new but in the past I have always had a call back within 24 hours at the most about any questions.

I was already very frustrated with some other things that have happened at my appointments lately so I don't know if that is coloring my perspective on this. But I'm wondering if you had gestational diabetes, how closely did your doctor monitor you? Would you consider this a big deal?