Don't fret. Austin, my first yorkie, had giardia when we first got him. The vet gave him meds and he cured right away. My other biewer, Chelsea had a bug, that gave her symptoms like Coccida but wasn't. She was put on IV overnight and on meds. She got better within days. They had me put her on food that has probiotics. This is why they are all on Fromms grain free kibble. I have three yorkies. I know what you are going through. The key Is, be consistent on the meds and food. She will be fine.