Most of my pain is in my neck and shoulder also. I also had an accident but is was a ceiling fan that hit me (it fell, I no longer will stand under one). My pain started in the neck and shoulder and then moved to other parts of the my body. Have you seen a rheumotologist, if not, you may want to ask to be referred. If you do have fibro, a rheumy may be better able to help you with the pain.
I hope you feel better soon!