Birthmom rights in California?

Hi, Almost 2 weeks ago, I went to court in what was supposed to have been a trial. My mother and stepfather are attempting to adopt my 3 1/2 year old daughter, Zoe, and I am, or was, contesting. When I arrived ready to go ahead with the trial, my court appointed attorney, with the help of my mother's attorney and the judge, basically coerced me into agreeing to an open adoption. I did not at all want to go along with it, however, they told me that if I lost in trial, I would not be able to be in Zoe's life at all. But after thinking about it for almost 2 weeks, I want so badly to change my decision and fight for Zoe! I have not signed anything, but I did verbally agree to the open adoption, and it's on court records. Is there a waiting period before the adoption is finalized where I can appeal, or is there anything I can do at this point to reverse my decision? I live in San Jose, California, and I would really appreciate some help/advice if at all possible. Thanks, Annette