Hi Lori,
I can sympathize with your dilemma because I've been there. I wish I could tell you why traditional medical doctors and chiropractors so often disagree about spinal injuries. It seems like traditional doctors often don't accept that some spinal variations are a problem. Of course, I can't tell you which is correct in your case. You might consider getting a second opinion from a different chiropractor to see if they agree on the diagnosis.
Personally, I chose to believe the chiropractor because I was in pain and he gave me the most logical explanation for my pain. As it turned out, he was right and helped me a great deal. (I should note that I grew up being told that chiropractors were quacks, so I was very skeptical. But I couldn't argue with the results.)
You didn't ask a question about the myofascial pain syndrome, but I would like to share a treatment option with you that can be very helpful for MPS. It's Myofascial Release Therapy. I've had it for fibromyalgia and it really made a big difference for me, but it was originally developed for MPS. Here's more info on it in case you're interested: Myfosacial Release Therapy
I hope you'll let us know what you decide to do and keep me posted on how you're doing. – Karen