Today I was walking down slippery, wet stairs with shoes that had no grip and as I reached the second step, I fell on my right lower back hitting the stairs, sliding for 1 second. There is intensive pain and it is hard for me to sit down and to lift up anything more than 10lbs. I also can't walk like I normally do, due to the fact that I hit my lower back really hard on the stairs. What should I do? This happened 6 hours ago.