If the grocery store was negligent -- if they knew the floor was wet and didn't clean it up, for example -- and their negligence caused your injury, then you may have a case. You can sue the grocery store for the amount of your medical bills, lost income, etc. You also may be able to recover non-economic damages, often referred to as pain and suffering. I'm not an attorney in your state, but I can refer you to someone there. Feel free to contact me.