I would expect your employer is being good about this. It was a widow maker, after all. They kill people.

The Flexeril would be my first choice but being seen by a neck specialist/ ortho/ortho-neuro would be top of the list. Did the ER do any X-rays or CT Scan of your neck ?

Tylenol/aspirin combined at full doses give pain relief like a low dose narcotic.

I just spent 4 days on Norco 5's then a dose of 2 Norco 5's. I'll never try that again. (325 acetaminophen w/ 5 of hydrocodone) Got off, had withdrawals (miserable anxiety) and switched to ibuprofen successfully.