Oh no, not the vet

We decided tonight that we need to go to the vet tomorrow.
The puppy was walking around on her leg ok, then, all of the sudden, she was crying and would not use the leg at all. So now, on the day my students come back to school, I have to take the dog to the vet.

She's walking on it now but has been very quiet in her crate since she had started crying. We aren't vets and really did not intend to have another creature at the house right now. We would love to not have to take her, but since she's having complications, we don't want to risk her permanent injury.

I have another video, but may have to work on it to upload.