Ive struggled with mental health issues the majority of my adult life and my mental state has worsened within the past week. I have decided to take myself to the emergency room on Monday. Ideally I would go this week but timing wise I can’t and I also want to prepare myself and my thoughts. Yes, I have a suicide plan. One that I’ve been preparing myself for. Obviously I am here to seek help as my last resort. My question is what should I generally expect walking into an ER?

In the past I've been to the ER twice for mental health issues and a terrible experience with a GP when I was seeking help for my self-harming, which has deterred me for wanting help.