Confused - new here!

Hello - I’m 11w4d w/my 2nd child. After receiving the results from my OB blood panel, my A1c was at 5.7 which is at the bottom of the range for prediabetic (5.6 was normal). My doctor has referred me to this program called Sweet Success with the hospital which will help me with a meal plan and blood sugar testing, I think. Of course now that it’s the weekend and I can’t call and ask, I’m wondering if I actually already have GD or if this is preventative? Does anyone know? Thanks!!