20weeks and stressing😰

Elizabeth • Serving your country since 2011šŸ‡ŗšŸ‡ø
So I'm a medical assistant for a family practice. This past summer I had my blood work drawn and sent in for multiple tests. The only thing that came back "bad" in those results was the fact my blood levels showed that I was insulin resistant. Basically, my body doesn't produce enough insulin to harvest the glucose in my blood and use as energy for my body. This does not mean I'm diabetic (even though it runs pretty heavy on my dad's side). 
So I got pregnant a few months later in September. No biggie. However, I am now 20weeks and I am out of nowhere completely concerned about having gestational diabetes. I haven't had my glucose test yet, but I'm stressing. Do I eat junk food? Yes, but what pregnant woman doesn't? I think I lead a pretty average lifestyle. A doughnut here or there, the occasional bowl of ice cream, and the most caffeine or sugar I consume in a drink each day is a sweet tea. I don't eat a boat load of sugar every day, but like I said, it does happen. I guess what I'm asking is if anyone has had similar situations with being insulin resistant, or pre diabetic, and what your out come with the gestational diabetes was? A part of me tells myself, if it's gonna happen, it's gonna happen. I've seen some of the healthiest women get it, and some of the worst lifestyles women go on to not have an unhealthy pregnancy. If I'm diagnosed with it, I can handle it. What I can't handle is if my son gets it because of what I've eaten, and the choices I've made thus far. I'm focusing really hard on improving my diet currently, but I'm just freaking out about it!