I am so pleased that you have come to get some support here, that you have made an appointment at your GP and that you are doing whatever you can to reconnect with your son, what wonderful caring parents you are, he is so very lucky to have your support. This is not easy and I am sure that it hurts like hell to hear those words from your child's mouth, to have discovered how bad he is feeling and to come to know he is hurting himself.
The first thing I thought about was would you be able to write him a letter, a note, something that he has that captures the way you feel about him, how much you love him all the good things about him. Perhaps not so much about how you are feeling about the self harming or worse or how upset you are to know this, just a really positive letter to tell him of your love for him. I feel like this will act in two ways, the first being that he will see how much you in fact do love him, he has proof, he has a letter, he has it written down. It will also be something he can refer to when he is feeling bad and read over and over again to reassure him that he is so very much loved and needed and wanted in your family and in your heart and in this world.
He is showing up to life everyday, when he is feeling so bad and this is a very brave and wonderful thing, he is showing up to life, good on him , he is trying. It is great to hear he has been seeking the help of a professional too, that is so very encouraging.
There are so many wonderful services, Beyond Blue have a phone service too 1300 22 4636 that you can perhaps access yourself if ever you need some additional support at this time too, just to get a temperature check to make sure that you are ok too.
We are here for you in this really safe and supportive place to comfort you and your family through this really tough time, you are doing everything right and should be feeling very positive about his journey to wellness, as you support him together.
Hugs to you and here to chat anytime you need some support.