TTC being heavy set

I'm obese according to BMI charts and got pregnant in three cycles each time so I'd say don't stress too much but use TTC as a way to motivate yourself to move more and make healthier choices. My first daughter was born term with no complications.Diabetes got me this time, but literally everyone in my family had it so I was doomed and I'm using it as a wake up call to make some changes. Otherwise perfectly healthy pregnancy, no weight gain, perfect blood pressure.