I am 5ft4 and 113 lbs - Mommy makeover - Vancouver, BC

My goals are to improve my body for the next 10-15 years. I am 5ft4 and 113 lbs so my body mass index is low and i really cant be any thinner. (i just end up binge eating if i eat any less anyway) I eat really healthy -mostly vegan and raw foodist and i work our 2 times a week as well as running around after my 2 kids (aged 4 and 7).
So I am generally happy with my body but 2 pregnancies have taken their toll. My abdominal wall is very lax- if i dont suck my gut in all the time i look 2nd trimester pregnant. and my breasts which i always liked have significant pstosis after breast feeding for 4 years (each kid 2 years if you cant do the math :))
My surgery is next week and i'm starting to feel really nervous. All the doubting thoughts. Am i being vain and narcissistic? The money for this would pay for a girls school in Pakistan? What am i modelling to my 2 girls? etc etc
But I just have this gut feeling its something I should do even though I'm very nervous.

Today did a vigorous exercise class, im gonna miss that for a while.

This time next week im gonna be post-op. Im feeling less anxious, this is a gift that i have this opportunity- hopefully it will all turn out ok.

feeling calmer now, i'm pretty sure i am in good hands, just hope the recovery is easier than some of the ones i have read here as i am going back to work after 19 days.