Fell at work onto buttucks, walk with a limp, left foot drop, and constant pain on the left side all the way down from my back to my leg, pain moving ?

Urgent matter: Any injury resulting in a loss of function is an urgent matter for medical attention. Foot drop due to an acute nerve injury can become permanent. Seek emergency care to assess your lumbar/sacral spine and the degree of injury causing your foot drop now!

Wit a neurologic : deficit like a foot drop I would recommend first seeing your own doctor for initial screening and imaging studies. May be a temporary problem but may not . Don't wait very long