High glucose levels?

I got a call a while ago from my clinic. My 1 hour glucose levels were at 226. They want me to get a kit with the test strips and monitor my glucose levels for a week. I know nothing about this and I'm freaking out. I don't want to do anything wrong or harm my baby. I don't know what to expect. How could I lower my glucose levels naturally? I mean, is it even possible if they're this high without having to take insulin? I'm really scared and freaking out.