Brought up yellow stuff when burped

Howdy!

Just wanted to enquire if anyone's bubs has ever done this.

DD is formula fed. Shes on Karicare AR formula for her reflux and also still has Infacol every bottle otherwise she continues to burp until her next feed and burping means more puking. Every time shes burped she burped she brings up a little of her feed with the wind. This morning she brought up some bright yellow fluid with it. It looked like the colostrum she use to bring up when she was born and we were BF. Im not sure what this is. Shes not on solids yet, isnt at all breastfeeding so what could it be. She seem happy enough otherwise.. doesnt have a runny nose or seem fluey at all. It wasnt really mucusy, just bright yellow mixed with some of her white formula.

Does anyone have any idea what it could be?

TIA

seems it sounds like Bile , (stomach acids) , was it after a feed ?? or after a break from feeding ... it it continues go to the docs .. it may just be a one off thing and she burped on an empty tummy and brought up bile ??

you know how somethimes we throw up in our mouths ???(eww i know but it happenss) thats bile ..
if it is bile and a one off -nothing to worry about ..
just keep an eye on her .... how is her behaviour??

Yeh it was after her feed when i burped her this morning. With the reflux she has she always brings up something when she burps. She seems totally normal, her normal happy self.
Ahh yep.. lol i guess ive never really known the colour of it.. hope its just that then. Shes never done it before and hasnt brought any thing up since. Will see how she goes, thanks so much Lea :)