Sorry. I don't have such experience . But sharing below article with you. It might contain helpful information. https://sg.theasianparent.com/how-to-prevent-gestational-diabetes-while-pregnant
do u consult endo/diabetes doctor. if your fasting is higher normally they recommend slow acting insulin or metformin. mine is after meal spike so my insulin is rapid acting
I tink u have to see what u r eating at night until ur breakfast which doesnt come down. I have very bad GD previously but my pre meals never exceeded so much n high