Going back to work

I need some advise, today I went and talk to my Boss about going back to work, I work for Wal-mart She knows I have MS She stated to me that my Doctor would have to give my 100% release before I could go back to work. that I could not have limations. I told her the only real problem I have is that when my body has the urge to go to the bathroom I better be there and if I was a Walmart greeter That would be hard I also told that I can't drive at night because my eyesight was not that good. she said then you better go full disabilty.because I could not come back to work unless I can work anytime.I need to work one because the house is driving me nuts. and for INS. I don't know what to do because my droctor said that he would not release me to go back and do what I did before. being a good greeter does not conces just saying hi to the people at are wall mart you have to push beggies if it rains or for any reason the beggies are wet you have to wipe them down, wash the windows and doors sweep the floors and you are not to sit down on your shift wish is 8 hr you get 2 15min breaks and one 1/2 lunch anyone got any answer for me I did ask her if I could be on the sale floor she said no. Ok know let me tell you also that after hurrican Katrina I help a store on the coast reopen I got off work in the morning and driving to the hotel I was concered still on the clock  when I got hit by a 18 wheeler the Lord took the wheel that day, anyways I had back surgery and all that and yes there is a lawsite on the 18 wheeler and walmart I just wanted to give you the whole picture of whats going on and yes I have a call to my Atty. What a mass.thanks for listening