I hear ya!! My back is out today and it is unbearable. I do have a bad back, and over the last 6 weeks it's had some really awful days. I've also had some of my best days. Im not big either, so don't need a brace, it's more to do with the softening. I have been doing yoga every morning, when i can, and for the first time I find this helps. Im doing a video called yoga for mothers to be. It's very gentle and the stretching really helps.
Im also starting acupuncture, as my chiro has said I can see her once a month but there's not much she can do.
Bloody nightmare, and i hope you find some relief. I had to take panadol today, as there's no way to function otherwise. Not that it does much.
Good luck xo