I just went through this with my boyfriend in January. We lost our 1 year old puppy Luxor to a horrible disease. He died suddenly and terribly, in a very traumatic way. Our hearts are still broken as Luxor and his sister Lulu (who we rescued together) were going to be our dogs for when we had children and when we get married.
It’s sometimes worse when they’re that small, you feel cheated out of a lifetime of memories that were to be had with them. I’m so sorry for your loss. I can’t quite offer any words of comfort except the fact that it’s better that you were able to experience 9 beautiful months of having this baby and all of its love, than not experience it at all.
I hope you find healing and comfort soon.