17 weeks pregnant, Gestational Diabetes, Blood Levels dropped?!?

[AshaLeeD]

I am 17 weeks pregnant with my second. My first I had Gestational Diabetes and with this one my glucose levels have already been on the higher end. Doc is pretty sure I will be Insulin dependant again at some point during this pregnancy. Yesterday and this morning, however, my blood sugar levels were all around the normal-low range (and I didn't change anything about what I would normally eat for the day). My before lunch reading was even borderline too low. My question is if this has happened to anyone else with GD, or if this could possibly be an early sign of a miscarrage? I haven't felt pregnant in a few weeks (mainly because my morning sickness has finally ended, hurrah!) Any stories, or insight would be much apreciated : ) Thank you in advanced : )