I'm sorry to hear this.

Was it helpful when the nurse called the duty Psych? I think if that happened to me I would find it scary on the one hand but I would also take it as a sign of someone caring about me and whether I was ok.

I think that you would be able to self-discharge from the MH services, but my worry would be that then you might still be left with difficulties, suicidal ideation or other things, but no help. That's why I thought maybe you can keep on raising how you are feeling with the service providers and see if you can finally get to a person or a therapy that helps you.