Poor you Kaori. It's so dibiliting isn't it? I had years of bad back problems after my many years working as a scuba diving instructor. Evenually, having tried physio and exercises I went to see Maria Sonberg at Clapham Osteopathic Practice. I've posted about them before (in connection with helping babies) but here is it again:
www.claphamosteopathicpractice.com
She and her partner John Carr have been keeping my back in check for several years now with their very gentle treatments and general health advice. I'll add a wish when I stir my Christmas pudding for your recovery.