Can I Be denied a job b/c of my Credit?

I was just offered a job at a hospital...the HR director called me and said "I would like to offer this position to you". I was so ecstatic. Then she tells me that I would have to do a physical. Okay, Im thinking drug screening, blood work, etc. But I just got a "welcome" packet in the mail and in it, there is a FCRA form for me to sign. What does this mean? Is my credit going to be checked? Problem is, I filed bankruptcy 2 years ago. Can they rescind my job offer? would they really do that? I was never told I had to have a certain credit score to work for them, sounds crazy to thnk about really b/c im certified and qualified for this position! Anyone w/any experience? I would have rathered they checked my credit when I first submitted an application instead of me going for an interview and then being offered a job!