gestational diabetes???

Sam 👼👧👼👼

anyone no how gestational diabetes affects you?? im 29w but my baby is measuring nearly 2 weeks bigger. iv put on weight during tge pregnancy just over a stone but only look like im all bump. my husband has type 2 diabetes recently so i use his machine to test sugar levels and they are always between 4-7. never high. see consultant next week and he will decide but what are the odds they just got my dates wrong??