I've heard of straightening of the cervical curve, but I don't know about the cyst part of it.
Hopefully someone here will have better knowledge on that part.
Was the accident a whiplash type or did you hit your head, neck, shoulders?
Is the pain in the actual neck vertebra area or in the muscles?
You are probably having some major muscle spasms, w/possible trigger points. PT / massage modalities should help with some of it.
does your chiro do c1/c2 adjustments? also called upper cervical, atlas /axis?
sorry I got your post mixed up with another similar one.
Have you considered an expert chiropractor?