Oh, Foxy. Perhaps it is time to have that MRI?? Try a different chiropractor or a specialist. I was getting paralysis in my face and left arm after getting kicked by a horse. My regular MD and chiro had no luck with it. Had an MRI. Still no luck. Went to a different chiro who made an adjustment in my neck and viola'. No more issues. Apparently my spine was not centered into the hole that goes up in your skull and was pressing on the nerves.
My MD is going to send me to a spine specialist after I complete a round of PT if it didn't get better, well it's 3 weeks before they could get me in for PT so that delays it even longer.
I could switch Chiropractors and give that a try, I am approved for another one nearby.
My Chiro thinks either there is an old injury that wasn't known that I re-aggravated cause I crashed on my atv about 1.5yrs ago or that I injured it without knowing recently when the pain started and it's something the x-ray doesn't show. The muscles are extremely tight, so adjustments are hard and don't last long, but I'm on muscle relaxers and they don't work well enough.
He's done wonders for my neck and headaches though, so that's why I choose to see a Chiropractor, I was on meds for years with no significant relief.
Have you given accupuncture a try ?
I myself have been going to an accupuncturist for over 20 years and try to go every 4 to 6 months.