Is it time to think things are not gonna get better?

Today i had to take our lovely little Tikka to the vets, they have kept her in . She has a uterus infection but thats the least of her problems , once they clear the infection they will operate to spay her however she has had a cough and sicking some phlemy stuff the vet is concerned that she may have tumours in her chest. The op she had to remove the lump on her mammary was cancerous and they did say that she could get tumours grow in her chest :( so our biggest concern is obviously that - she is having xray and blood tests they clearly cant op on her uterus if she has chest tumours we will know more in the next few days. Initally we need her to get over the infection. The vet didnt seem  optomistic on the out come :( :(  Just seems every horrible thing that can happen to us does  :(

I just want to have a little longer with her, before she goes to be with my mum and dad  - Finding it all very upsetting she such a lovely placid lazy little thing