Hello, Welcome to HCM, I am Dr. Das, Firstly, during pregnancy, the normal criteria of fasting and pp sugar for diagnosing diabetes is not accepted. If, during pregnancy, you have higher blood sugar level, then you have to go for oral glucose tolerance test. If result of that indicates intolerance to glucose, then you should be diagnosed as Pregnancy induced diabetes or gestational diabetes. The gestational diabetes will cause some harmful effect on baby like increased amount of liqour, growth retardation, etc. Now, for this, you have to take Insulin. Insulin is a category B drug that means it is not studied in human model but it is not found to be harmful in animal model. So, overall, if required you can take Insulin. Regards.