Ultrasound frequency.

I know I shouldn’t worry so much but as I entered 3rd trimester, I wonder if subsequent scans will be more frequent. Currently, my standard gap is 6 weeks and I find it abit long. I’m at 28 weeks now, last scan was on 7 oct, next will be on 11 nov. Baby is growing well, active and within acceptable weight range. But I was diagnosed with gdm at 24 weeks, and doing twice a week self glucose check as per recommended. Results are more or less within range. My birth plan is natural delivery w/o laughing gas or epi, but starting to get a lil worried now. Any advices to calm the nerves? FTM here.