I'm not safe anymore and recent events have caused me to go over the edge a bit

I discussed it with my pdoc last Wednesday and he wanted me to go in then, but I refused. Things have gotten worse since then
I'm just asking how to do it. I don't want to call my pdoc or make it seem like an emergency. I can make it to a place without harming myself. And I definitely don't want to call an ambulance.
Do I just walk in a hospital's front door and tell them about my plans and then they'll take me in, or what?
Help me, guys, please. I'm at my wits end and I just don't have another choice at this point