Pup keeps puking

[BeMoreZenLike]

She is 6months. Went swimming in a new lake /duck pond yesterday...
Will phone the vet when they open.
It looks like bright yellow phlegm. (Sorry tmi)
Really worried about her

[Veterinari]

It sounds like she may have an infection/swallowed too much water.

Can she keep water down? (offer little and often)
How is she in herself? Give your vets a ring. They'll be social distancing but will hopefully be able to see her and give her a jab to stop the vomiting