What should I do about this?

Alright, we'll start at the beginning. I lived at an apartment for six months, the length of the lease. While living there my pet did a little damage, 2 small rips in the carpet, a few tears in the corners, but about a three inch wide rip at the door. There was a small spot where my dog had an accedent and I tried shampooing it and it didn't come up. When I moved out my landlady had replaced the carpet in the entire apartment. My deposit on it was 510 dollars, 360 in security and 150 for my dog. But after I left the apartment and she replaced the carpet, she stuck me with the bill for 1500 dollars, taking out my deposit of course. She came up to my work and told me that I would have to pay the rest, explaining that she would write up a contract stating so. She came up to my work a few days later while I was still working, I work at a grocery store, bringing me the contract and telling me to sign it. I read it over and told her that I wasn't going to sign it. She then threatened me that if I didn't sign it, she would take me to court. So, not wanting to go to court and busy with customers, I signed it. If I take this to small claims court and I explain that I was forced to sign the contract while still working at my job, will I win and not have to pay her any more money?