I would not expect any worsening of symptoms in subsequent pregnancies - it does not seem to progress this way. Gestational diabetes is very common and it's so good that the doctors now screen for it routinely as the greatest concern is with the out-of-control diabetic. Well-controlled GDM generally results in a healthy mom and baby.
Having had this in pregnancy does predispose you to the possibility of developing type 2 diabetes in the future but it doesn't cause this; just suggests that you might be more prone to it than some other people. Whatever causes it in pregnancy could also cause it in later life. You could do some things to help prevent this however. Regular exercise, a diet low in refined sugars, and maintaining a healthy weight can all help prevent diabetes.
Best wishes and good luck with your plans.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN