my baby has been having yellowish green poop (looks a bit sticky too). it's less grainy and much more watery. should I be concerned? she's 4-month old, fully breastfed.

Is this a one off occurrence or has this been happening often? If you notice a succession of watery green poop, your baby may be consuming more foremilk than hindmilk. If baby drinks more hindmilk which has a higher caloric count, your baby's poop will be more yellow than green. http://www.babycenter.com/404_whats-the-normal-color-of-a-breastfed-babys-bowel-movement_8830.bc