Overweight while pregnant - anxious

Would just like some advice I found out a week ago that I’m pregnant this is my first pregnancy and I’m very anxious about everything including my weight. I know I’m overweight and I know I’m probably going to be lectured about it I’m now concerned about baby…

What shall I except with my first midwives appt?

The doc has already rang me to offer a higher dosage of folic acid due to my weight and now I’m just panicking.

Any advice would be great.