Thanks linvillegorge! Yeah, it sounds scary, but already have passed 5 weeks from that accident and I don't feel any pain. I am wearing back brace when not laying in bed, can't hold heawy things and sit yet, but it sure heals. Week ago I was in hospital and x-ray didn't show what it's getting worse. Next x-ray will be done after ~3 weeks and if everything ok, probably doc will let me come back to work, drive car, sit, etc. Just it takes time to fully recover, but I will be able to do everything, that I did before in my life. Probably I will not push myself the next season, but sure I will be able to do buttering and some rails/boxes.
Since now I want to protect myself as much, as possible. Because when doing just small things, you never can't be sure, if someone else will not hit you at high speeds or something else bad happens... For me there is no more question to wear protection or not to wear.