joshuas mommy...I know it hurts that your child isnt with you. maybe reading some of your past posts will help you to answer why they may have given the father custody...some of your past posts had some of us here on psych central worried about your's and your son's health and safety due to some of the things you were posting.

sometimes a parent with an abusive past can gain /regain custody of their child if the courts and treatment providers feel they have complied with all that they were asked to do (it may be that the father completed doing some work / what ever work was asked of him, that you were not given that information because of confidentiality rules. the father does not have to tell the childs parent whether they went to therapy, parenting classes and other things that need to be done. social services and mental health are prevented by law from sharing that information with the other parent unless the one gaining custody signs a release form)

bottom line is most likely the court and mental health found the father to be stable and complying with all that was required.

thats not saying you can never have custody back because you can,it just takes getting healthy and stable, taking meds as prescribed.

my suggestion is work with your treatment providers, take your meds and comply what they want you to do, then you can go back to court and get your child back when mental health says you are not having any more problems from your mental disorder and that its safe for your child to be in your care.