I suffered a skull fracture 2 years ago - Do I have grounds for a lawsuit?

Accident occurred at a fitness club - caused by a fall backwards. Injuries include Occipital fracture, hearing loss in one ear - 77% vestibular loss in same ear. Complete loss of smell - hence loss of most taste also. Ear surgery to try to correct chronic spinning vertigo - did not work, still have vertigo daily - if not drop to the ground spinning, then constant nausea. It's been almost 2 years, and now I am worried about my future. I don't even know if I have what could be called a legitimate lawsuit. My initial thought was not to seek litigation, but as time passes, and there is little to no improvement, and my life is forever compromised, my feelings on this issue are changing. Any insight that could be provided would be appreciated.