Weight gain

Karla
This is my second pregnancy. I measured on my own (analog) scale right when I found out I was pregnant, and have been tracking throughout this time. I weighed yesterday and says I have gained 8 lbs so far. I am 18.2, and with my last pregnancy, I gained either 27 or 30 lbs through the entire pregnancy. Opinions? Am I doing well at 8 lbs so far?