Gestational Diabetes ): GLUCOSE TESTING

So I took my 2 hour glucose 2 days ago and my Ob already called me back saying I have gestational diabetes. I am so depressed right now... Idk how to really handle this or what to do about this. She also said that my baby has a bigger chance of being a large baby & I really really don't want to have a c section. I want to try my best to do natural birth!!! I'm beyond sad & emotional right now))):