Sally, the reason I haven't answered that question is because I am not here to think about, or argue for, how to treat trans people. I'm not sure if your child is trans gender or intersex or any of the details. So if you are asking me about what I would do if I had a trans gender child, I don't know.
(The issue about self harm and the other problems occur to many children and there are a range of ways of dealing with them. Self harm, for example, I would deal with through counselling, a harm reduction plan, allowing the person to control their harming without intervention and without myself or other people attempting to stop it. So all the usual self harm treatments. But I doubt you really want to know my answer to the details.)
No back to the reason I don't know how I would help a person with trans gender. That is because I am not a trans gender campaigner. I'm not here to campaign for the rights of trans people. I am primarily concerned with the rights of women, and in addition to that I am concerned with gay rights, which I believe to benefit all women.
I believe that some of the rights that trans people are campaigning for damage women as a group. So I believe that the rights of trans people are sometimes at odds with the rights of women. That sometimes happens with different social justice campaigns. It can happen in may ways, including legally, which is why disability, gender, race, sexuality and religion often come into legal conflict and there have been lots of test cases around it.
So I don't believe your child is a freak or that you are an abuser. But trans issues are not my fight - they are your fight. And other people, people who do not have any trans issues, have issues of their own. And they need fighting for too. The group that I am fighting for is women, who in many ways around the world, don't have the luxury of believing their lives as women a 'state of mind.'