Will I have a good hard case against walgreens that's sure to win?

Ok before I go any further, I'm not interested in hearing everyones rude comments about me being sue- happy or that I'm lazy and should make my own money. That's not what this is about so save it for someone else. Ok here's my story... This past Tuesday I was in walgreens late at night to get a gallon of milk. I walked over to the dairy section and a manager was standing there waiting on another employee to clean up a spilled beer that a costumer had dropped. There was a caution sign and the manager informed me of the spill and to walk around it, so I did. I grabbed the gallon of milk and pivited my feet to turn around. As soon as I did I fell. I had on flip flops and my feet came out from underneath me and I landed on my entire left side. I slightly hit my head, but landed quite hard on my arm, wrist, hip and knee. It took me a moment to get up bc I was a little dizzie and off balance. The manager saw everything and helped me get up. I was so embarressed so I just said I was fine and went to check out. The manager came over to me and asked if I was sure I was ok and if I needed to go to the hospital. I showed him my wrist bc it was red and said it hurt but that I didn't need to go to the ER or anything. When I got home I told my dad and he called walgreens. He was surprised that they didn't have me fill out any paper work such as an incident report. He told the manager that we both thought that it was nothing but we just wanted to exchange information just in case. As the night went on and the next two days while I was working( I'm a medical istant at a doctors office, so I'm not some lazy bum trying to get rich quick) the pain in my shoulder, arm and wrist became unbareable. So Thursday after work I went to a crucial care facility to get xrays, still thinking it was nothing more than a sprain. To mine and the doctors surprise, my wrist was broken and my shoulder and hip had a contusion. They gave me a copy of the xrays and wrapped my wrsit in a soft cast. The next day I couldn't even work bc my manager didn't want me working on a narcotic and bc I couldn't do much with one hand and the pain I was in. So I went home. It's going to take 4-6 weeks to heal completly and I have to be in the cast for about two weeks. So obviously this is a big inconvenience for my job. Do you think I have a hard case that will definantly win if I try and sue? And how much do you think I can get and how long do these cases take to finish? Thanks for your advise