If the disability is work related, you may be able to obtain disability benefits if the Employer cannot accommodate your temporary limitation. If your disability is non-work related, you have to be able to perform the Essential Functions (with or without accommodation), but you will probably have a burden to show that reasonable accommodation is possible. Maybe a food cart if the aisles are wide enough? Maybe you are out of work if reasonable accommodation is not feasible. Every problem does not have a legal remedy, but it is worth a try. And yes, it will take some time.
I represent Employers, but I can recommend Worker Attorneys in So Cal if you ask.
It sounds as if you are on the right track. The question is whether you can perform the essential functions of your job with reasonable accomodation under the ADA. You'll need some legal help with thses issues. Click on the link above for Find a Lawyer.