Sorry this reply is late. Do not stop taking metformin. Do monitor your blood sugar closely and be careful with diet (avoid sweets, lots of carbs). If your blood sugar cannot be well controlled with metformin, your dr may start you on insulin, which is the preferred medication for managing diabetes during pregnancy.
It is important that your blood sugar is very well managed during pregnancy to keep both you and your baby healthy. Ideally your blood sugar will be maintained between 70 - 120, and never more than 140.
Being a dibitc doesn't always affect peing prego. If you're healthy so will ur baby. I was told to stop if/when I become prego. Ask ur doctor before stopping. GL to u and the new lil one
PS I've been a type 2 diabetes since I was 17. Can my diabetes harm my baby???