My doctor decided to take me out of work, I am only 20 weeks pregnant?

I am 20 weeks and 2 days pregnant with twins. A few days ago I thought I was leaking amnio fluid. I spent hours in the hospital, to find out it is my bladder. The doctor in the e.r. put me on bed rest, no , and no lifting. My regular doctor feels that because I am in my second trimester that I should be out of work and resting, not doing anything that may cause stress or bodily discomfort. My question is how does disability work? How long will I get it? If it runs out then what do I do? What are other options to help out with the money situaution? My husband makes decent money, but not enough to support us and to have extra money for baby things. I live in NY and work in a nursing home.