Not Diagnosed, But Sure I Will Be

Hi, first time poster here. I'm currently 11+5 and have PCOS and am overweight. I've been on Metformin in the past, but not actually diagnosed with anything (used off label for weight loss). I fully expect to be diagnosed later in my pregnancy, but would like to be proactive if possible. What are some steps I can take to help my health, babies health and my general risk for GD?