Talk to Pediatrician on Vomit While Pooping

AOA, meri beti 2.5sal ki h. wo jb b poop krny k ly pot py bethati h wo vomit krny ki try krti h ya vomit kr deti h. some time bht zyda some time thori c ya bilkul ni. poop soft hoti h not hard. she is active, healthy, diet b thk h. & wo belly m pain ki complain b ni krti. kiya waja ho skti h k wo vomit krti h poop k waqt.?