I know how you are feeling. I went through it on the 12th May when I had to do the same thing on my own with our vet. I was lying on the floor with my Jake and held his head until he took his very last breathe and it has broken my heart totally. It is so so hard isnt it when a pet is special to you
and you have them with you for so long. They are like our children and my Jake was my baby like your little one would have been your baby. I am crying as I write this to you and please know that I understand 100% all the
emotions that you are going through and will go through until time heals your heart.