What can I do to get my son back from his grandmother? 4 Answers as of February 13, 2012

What can I do to get my son back from his grandmother who claims I'm on drugs and went out and partied while with my son? In her court order she made so many false accusations about me. I do not know how to defend myself in this case. I relapsed once, regretted it, wrote about it in my personal diary. She found it, copied it and used it in her report. All the letter says is that I messed up. I won't do it again. I need to take care of my postpartum depression that was killing me inside. I am a convicted drug felon. Before my relapse, I was clean for 18 months. I've been clean for five months since that relapse. She is doing whatever she can to make me look bad and I really don't know what procedures I should take. What my rights are or what I do?