She might have reflux or something. Try not to have her completely flat when you lay her down and make sure she can move her head to each side too so she can expel from her mouth if she is sick. Babies will naturally turn their head to ensure sick comes out of their mouths. I keep my boy sitting in his car seat if I'm not holding him. I also have a cocoonababy for him to sleep in so he stays slightly upright in more of a foetal position while he sleeps. Might be worth bringing your little girl to the doctor to get her checked and to ease your worry.
My daughter does the same thing after each feeding she has done it like 3 times she's two weeks old took her to her two week check up mentioned it to her doc and he said just to promp her up for 30 min to not lay her down but he said its completely normal! !!
I think a trip to the pediatrician is a good idea.
She did it again but on a bigger scale, her eyes bugged out, she flaied like a fish out of water and couldn't make a sound. Her daddy and I panicked and grabbed the bulbs and started clearing it out but we can't get this last bit from her nose.
A lot of white gunk came from her nose too
My daughter does the same thing, mostly after feedings because she eats very quick and she eats too much, so she spits up some. But that's all it is. She's always in something that leans her upright slightly too, so just try that. It seems to be a normal baby thing. Just wipe her mouth and use the blub when needed. I only use the blub for my daughter's nose and I let her spit out what comes out of her mouth.