7lb baby already!

I have gestational diabetes so I'm seeing a specialist and when they did the ultrasound the other day they say he weighs almost 7lbs already and measuring 2.5 weeks ahead but super healthy!! I'm so scared and nervous especially being a first time mom. I see my ob again this week and he may or may not change due date...again... needing some supportive words because I'm so worried and just want to keep my Lil guy safe for the rest of his stay in there