Ela - she actually asked about FeLV, not FIV!! The lifespan for FeLV isn't as long as FIV, but it really does vary from cat to cat, and she might not even have it. It is worth getting it done if your vet feels it is necessary though. There is no treatment as such, but it does really depend on what symptoms are present, as it can affect them in different ways, and in certain ones, things can be given to help alleviate them. I do hope that your vet doesnt push her back till Wed, this needs dealing with asap