Metformin with pregnancy

Anyone here took metformin and loose weight? Im pregnant, and got pregnant by taking metformin. My doctor told me to continue to take my metformin to prevent Diabetes which is prone when you’re pregnant. Since I took metformin I lost weight and now pregnant im kinda worried to loose weight by continue taking metformin. Loosing weight is my only sideaffects from metformin. Just wonder if any other woman here taking metformin while pregnant? How is your weight did you gain weight on Second Trimester?

Thank you.