My mom woke up very dizzy and it been 3/4 hours and the dizziness is still continuing, she's having back and neck pain and is also very nauseous?

Sounds like your: mother should be evaluated in person. She may have a form of vestibular dysfunction that could be related something as benign as a viral infection. Alternatively, it could represent something more serious like compromise of the blood supply to the back of the brain or brain stem.

Seek medical care: Your mother needs to be medically evaluated in person to determine the cause for her symptoms.