My cat was diagnosed FIV+ back in June. The vet said because he was so anaemic and weak that he'd probably have a couple of weeks left to live. He gave him antibiotics and an injection to boost his bone marrow.
I don't know what was in that injection, but he's gone from strength to strength! He's gained weight, his fur is fluffy and in good condition, he's eating well and is full of life!
I was so sad when he was diagnosed, thinking we'd lose him soon. Now I cherish the time he has left and enjoy him all the more.
HTH someone who maybe going through the same.