Try not to worry too much. I know that's easier said than done, but your diabetes team will be watching you and baby closely and if they don't seem worried you shouldn't be either. Do you know what centile your baby was on?
If you've got good control and you're attending all your appointments, that's all you can do. Keeping tight control is important. It's a lot of work and a lot of testing, but it helps keep your HbA1C as good as possible.
Were the 8s and 10s after meals? That's when I usually got highs. I had to increase my bolus insulin and sometimes take correction doses too. If I got a high I tried to get it down as soon as possible, always being cautious and safe, of course.
Growth scans aren't perfect, but they're the most accurate way of estimating baby's size. They can be out by a bit though so they're only a guide not an exact weight.
Keep your control good and just try to relax and enjoy your pregnancy. Believe me, it'll be over all too soon. Mine flew by.
Best wishes,
Azure