I'm so sorry. I know you have struggled with her health for so long, and done everything you can for her.
It's the last gift we can give them, to end their suffering. One of the hardest act of love for us tho.
You are not alone. We are here.
If you want you can share pictures and stories when you are ready. It helped me , to focus on the good stuff, the good memories. To not focus on the ending, but the life lived