Well, from what Ive read supply is only minimally effected by calories - however - YOUR health is affected by yuor caloric intake.
Some people simply eat more than others for starters, but we must consider that breastfeeding alone burns 500 ish calories a day. So - to maintain energy levels for YOURSELF you must account for that and try to consume more calories.
There used to be a lot of discussion about calorie intake (several years ago - think your mom & grandmothers generation). It was once thought that if you didnt eat well your milk wouldnt be rich enough. Well - thats not necessarily true. Your body prioritizes from what we know now and will first and foremost provide the baby with the milk & nutrients necessary to survive, sometimes depriving your body in the meanwhile though.
Women in third world countires who barely eat & are severely malnourished breastfeed & their supplies sustain their children far beyond what most mothers here nurse.
My suggestion would be to take a few days - get a general idea of how many calories youre consuming & take note of how you feel. Rather than trying to eat a lot at once, try to snack on things that are high in protein & calories (chicken, nuts, etc)... the general rule of thumb is 2000 calories give or take. You may just need fewer calories to operate esp if youre a small person - I"m not a fan of the one size fits all mentality on anything.
And heres a great article from kellymom.com - the site I trust the most:
http://www.kellymom.com/nutrition/mom/mom-...ies-fluids.html
But it sounds like your little one is thriving just fine - the initial weight loss is absolutely normal & even expected. The new weight is absolutely perfect & says hes doing wonderful! Whatever youre doing seems to be working! And keep in mind -when you do those growth charts, they typically use the one for formula fed babies - ask for the breastfed baby weight chart if you do start comparing percentiles
Lala...