Quick Question

Okay , so I had an eating disorder and would starve myself when I was 15/16 and I got pregnant at 16 . I went from 140 to 110 within 2 months and when I got pregnant I went from 105-175 . I gain almost 90 pounds and they said it was normal since I was underweight . I lost some and then I'm recently at 140/150 area and I found out I'm 5 weeks . My question is do you gain more or less weight with your second pregnancy ? Or does it just depends (The first picture is now and the second is when I was 16/17 I say before I had her)