Overweight and pregnant

Hello all! My husband and I have been TTC for five months now- and our home test just came back positive last week! 4 weeks and 4 days by my count. We have been constantly dieting, trying to lose weight (I am 80lbs overweight, he is 50lbs over).

Anyone else concerned about gaining more weight during pregnancy?

Any tips and tricks to NOT gaining while giving the baby needed nutrition? My first pregnancy I was 40 lbs over weight and my doc was constantly worried about my weight... which caused my anxiety to go through the roof at every appt. I am anxious and fearful about that now, and I plan on talking with my doc about how I know I am overweight- bit that I have anxiety about the constant attention to it.

Help?