Glucose test at first prenatal? Please no rude comments

Had anyone else had to do this at their first prenatal appt? I’m not against doing it, however, I have PCOS and have bee following low carb /no sugar for the last 6 months, which has been the only way to regulate my cycles/ovulate. I’m worried if I do the glucose test it’ll throw my hormones back out of wack and cause me to miscarry. I’m sorry if this sounds stupid but whenever I go back to eating carbs and sugars my pcos comes back full force