Gestational Diabetes Q

Is it ok if I sometimes (say, once a week), get KFC and have my levels shoot way up? I have serious cravings and 99% of the time I keep my levels under 7mol. I’m dying here, but I’d feel guilty if I’m doing damage. Keeping weight down to help isn’t an issue for me for the record, so that doesn’t factor in, I’m only 115lbs.