At what point do I go to a psych ward?

I am 14m and I have had really bad mental health for a while but it got really bad about 2 weeks ago. I started to cut myself and I have been thinking about suicide like how I would do it, how people would react, and if the world would be a better place. I feel worthless like the world would be better without me in it. I don't wanna die but I want the pain to stop. I kinda wish I was never born at all.