I've known that feeling only too well when having to put my furry friends to rest. All these reminders can just choke you up. My condolences, they are special to us. That being said, there is an animal looking for a happy home, that wants to be loved and will love you unconditionally in return.
As for all the other stuff piled on your plate, it is only temporary, but yes it feels like someone has dumped the world on your shoulders.