I had about the same thing happen to me at Walmart a few years ago. As i walked past the ice machine, there must have been a bit of water, and I slipped in it. I crashed down on my back and head; and the shopping cart fell on top of me. After i could breathe again and move, they helped me out to the car, and said they would contact me to help with medical costs. They called later that week, and explained that i had to have a full doctors exam, showing that there were no prior injuries to my back before they would cover this injury. Like you, I had no insurance, and no money to even go to the doctor.
Hopefully, this will turn out better for you. And---- Welcome to the forum ! ! By the way, are you a lineman, Sparkey ??
HappyFlowerLady