It's several days later and my back is feeling not much better. Tomorrow is a holiday so Tuesday I'll go back into the hospital and see what else need to be done. I hope nothing permanent.
I'm learning from this experience. In the future I'll be concentrating on Sumo Deadlifting only. I'm finding I tend to cheat, raising my butt, when pulling conventional. Pulling Sumo puts me in a much better position. Less chance of injuring my back again. As I like to lift Sumo in gear it only macks sense to pull Sumo raw.