Weight gain worries

Ha

I went to the dr yesterday for my check up at 17 weeks + 2 and apparently I already gained 8 lbs so far. The dr was worried about this baby being larger than my 1st because she said, "statistically, 2nd baby tends to be bigger..." My 1st baby was 8.6 lbs (girl) and it was a MIRACLE that I had natural labor (36 hrs). I am pretty small built (5"2') so she worries that if this baby is too big I might have a c-section, also this time around I am having a boy. Now I cant eat freely like I used to. 😭 Anyone in the same boat as me???