Hi Rozy,
I believe you've made the right choice by not letting this chiro-man suck the money out of your pocket.
Have you ever had an MRI done of your back? No matter how experienced a doctor is, without advanced scanning tools the diagnostic is only guessing work. If you'll decide to do an MRI, make sure you'll tell them that you do not want to be injected with a contrast die. After you find out what's really wrong with you, thread carefully... I found yoga exercises very helpful.
I Wish you speedy recovery!