Smaller Second Baby??

My first baby was 8.12 pounds. I know the trend is for babies to get larger with each subsequent pregnancy! That pregnancy, I gained 32 pounds and did not have GD. I had started at a normal weight. However, I did not eat great and did not exercise. My fundal height always measured 1-2 weeks ahead. This pregnancy, I started at the same pre pregnancy weight. I have been working out 5+ times per week, and watching what I eat. I had my first fundal measurement today and it was spot on. I guess I will see what further measurements are, but even my first measurement was 2 weeks ahead with my first baby. I guess this was a long way of asking if it is crazy to think this baby could be the same or smaller than my first? Or do I need to plan for a 9/10 pounder😣? I am trying my best here but I know a lot of it is genetics!