I have answered this question in another post, but I would like to add that some intervertebral disk disease problems require surgery. If the medication did not help her than please take her to a veterinary neurologist ASAP. Additionally, there may be more than one issue occurring simultaneously, i.e.: disk disease, gastrointestinal disease, an eye issue, and Tick or other disease.
The medications that help for disk pain are:
Steroids, Tramadol, and Amantadine for pain; and, Pepcid and Sucralfate to protect the stomach from harsh effects of the pain medications.
Acupuncture, Chinese herbs, and, Western medications can also help.
The eye problem is probably unrelated to the musculoskeletal condition.
It really sounds as is she has a spinal injury, in her cervical region and possibly in other spinal areas. This could be invertebral disk disease, or another spinal problem, and can be extremely painful. Spinal problems do not show up on X-Rays usually, unless the problem is so chronic that bony changes have occurred.
Another possibility is an infectious disease, such as a tick borne disease, such as Lyme's, Rocky Mountain Spotted Fever, Babesia, Ehrlichia, Anaplasmosis, etc.She should be checked for these disease, and others.
pz get her to a vet asap, with little dogs you never know what happen let us know how shes doing