They may have to monitor you more closely. Especially when you give birth :) like 19jellybean said.... it could be that you have Gestational Diabetes.... but will go as soon as you give birth. Please talk to your doctor about your concerns though.
I'd be asking your doctor about getting a Glucose test done. I'm not a doctor but you could have gestational diabetes, high sugar levels and low sugars are signs of gestational diabetes. But definately talk to your doctor about a Glucose test...