Girls may have had something like this... We've been at it for 1.5 mon…

Girls may have had something like this... We've been at it for 1.5 months. Already three weeks fully on IV. I've started noticing that the baby poops first a little green (by the way, it comes out tough and she's restless), then after about 10 minutes it becomes normal yellowish color!!! Called the pediatrician, he says it's colic. Is that right? Has anyone else experienced this?