GD & belly measuring big??

So I was recently diagnosed with GD (ugh) and so I’ve been eating low carb and cut out sugar except for berries. At my last ultrasound they said I had a good amount of fluid. At my appointment today I was measuring at 36 weeks and I’m only 32 weeks 4 days. I need to schedule an ultrasound tomorrow to check the fluid around baby to find out if she’s just big or if there’s too much fluid. I’m kind of freaking out! Anyone else have this happen and everything turned out fine? I don’t want a huge baby and I definitely don’t want there to be too much fluid around her. Eek!!!