Tomorrow, my dog will be crossing the bridge

My beautiful yorkie of 14 years, is going to be crossing the bridge tomorrow. I'm extremely inconsolable and I don't know what to do. Just two weeks ago I took her to the vet and got medication but it wasn't for the right things. She kept throwing up and not eating so we took her to a different vet yesterday. Ran some tests and see that she has a severe kidney failure... It breaks my heart to see such an energetic so weak like this, she hasn't eaten in days. She only weighs 3.12 pounds now. She can't even walk or hold her head up and I know it's time. Is there any way to make her last day any better? I wanted to feed her all of her favorite foods and walk down our old neighborhood but at her state right now, both seem unlikely.. Even if there's nothing, I would greatly, greatly appreciate any kind words. I'm so scared to have her leave me and have me leave her but keeping her any longer is selfish I know. I pray that she does not pass during the night either.. I keep thinking about the euthanasia process and I don't know what to do.

Please and thank you.....