help me

you can quick add -500 (NEGATIVE 500) calories to account for the milk production. that will give you 500 extra cals to eat in a day.

or log 500 calories of breastfeeding "exercise"

or custom-set a calorie goal.

http://www.myfitnesspal.com/topics/show/819055-setting-your-calorie-and-macro-targets


AND CONGRATULATIONS!

There is no automatic feature. You have to adjust your calorie goal manually. Consult a medical professional on what that goal should be.


http://www.americanpregnancy.org/pregnancyhealth/pregnancynutrition.html

http://www.nhs.uk/news/2010/July07/Pages/new-nice-guidelines-weight-pregnancy.aspx

http://guidance.nice.org.uk/PH27

UK guide in PDF format
http://www.nice.org.uk/nicemedia/live/13056/49929/49929.pdf

Edited to add NICE summary.