A.L.
hello
I had GD with my daughter. Up until I went into the hospital, I was being told that I my daughter was going to be 8-9lbs because of the GD. My levels were low as well, but I did follow the diet to the letter. I did have to take the short acting until I went into the hospital for delivery. My daughter was delived via c-section because they initially thought she was no longer feeding from the placenta. I was scheduled in week 38. My "large GD" baby was 5lbs 2 oz when delivered! She's healthy and happy (now almost 4yo). So I would say as long as they are saying the baby is doing ok (I too had to go into the office twice a week to be hooked up to the monitor), dont' worry about the weight. Not all GD babies are not heavy weights!
Best of luck to you and congratulations!