Dwert,
Hope your baby gets better. The way you describe her projectile sound icky. lol It is very strange that she JUST started this randomly this week imo, although i am clearly a yorkie rookie at this point. I would just take her to the vet for a routine xam or call and explain whats going on and see what the vet says. if you trust your vet, and he/she knows all there is to know about your baby, im sure they will help you over the phone or give you some clues as to what you need to try. if you havent introduced ANYTHING new this week, no new food/treats, medicine, toys, or ANYTHING..then maybe she just got into something outside when you took her out?
It seems weird to me that she would just start doing this randomly twice this week with no history of it.