Am i diabetic? or is this Gestational diabetes?

Ok I was diagnosed as Hypoglycemic about 4 years ago. I have had 2 kids since then and im pregnant again iam currently 15 weeks along and I know my morning sickness is gone for good. but i keep getting really sick through out the day and i have a meter already so i check it in the AM and it is low and then ill eat yogurt or cheese or somthin high in protein. and an hour or 2 later ill check it again cuz ill get really sick again and its down in the 60's the last one i just took was 63 and that was an hour and a half after eating some high protein yogurt. The Highest its been is 91 which is normal and thats great but i cannot seem to get it any higher. and after a little time goes bye its back down again! i dont kno what to do?! and im worried its going to hurt the baby. please help.