I am grateful to everyone who commented on the last post and wishet me to get better. It's a week since injury, and I am getting better, albeit slowly. Luckily my wife is - among other trades - a professional medical messeus and is working full time on my back.
I only hope that this is a ono time setback that can be avoided in the future by improving the technique, and not a chronic problem that can potentially stop me from doing this sport.
Thanks again everyone!