Blood sugar reading spiked!

Diagnosed w GD at around 25 weeks gestation. Readings have been in controlled and well throughout, until I hit 36 weeks-ish & my readings after meal goes out of whack. I’m still eating the same stuffs as I did when maintaining my sugar levels previously. Not sure why it’s becoming so out of whack during my last homestretch. Any of you face the same too? What did you do? At this rate (now 37 wks), I can’t wait for my baby to arrive... :(