I'm a bit confused, but I suppose we are talking about FIP and not FIV?
FIP is extremely hard to diagnose, and usually can only be said with certainty after an autopsy (Which we will hope won't get that far in this case). I am no vet, but I have seen cats with FIP before, so I hope I can help you a little. The only symptom your cat currently has is a fever with no obvious reason, correct? Is she at all lethargic, not eating, seems to have a swollen stomach, has difficulty breating or other symptoms? Is she well grown for her age, or is she small? You mentioned she's been weak since the start, how weak are we talking about?
Also, have you kept track of her weight? Is it still going up? Is it standing still? Has she lost weight? This is all information that can help, also with the vet. So if you have it, make sure to share it with them.
Try to not think about the worse just yet. You are only worrying and it might be for nothing. Worry when you know more, and until then keep it easy and enjoy spending time with your little kitten. For all we know it might just be some small hidden inflammation (which causes a fever) that's just being annoying Keep a good eye on her and try visiting multiple vets if you can to get a good diagnosis. More vets do see more than one, of course. But until you know what it is, try to not think about FIP.
FIP is extremely hard to diagnose, and usually can only be said with certainty after an autopsy (Which we will hope won't get that far in this case). I am no vet, but I have seen cats with FIP before, so I hope I can help you a little. The only symptom your cat currently has is a fever with no obvious reason, correct? Is she at all lethargic, not eating, seems to have a swollen stomach, has difficulty breating or other symptoms? Is she well grown for her age, or is she small? You mentioned she's been weak since the start, how weak are we talking about?
Also, have you kept track of her weight? Is it still going up? Is it standing still? Has she lost weight? This is all information that can help, also with the vet. So if you have it, make sure to share it with them.
Try to not think about the worse just yet. You are only worrying and it might be for nothing. Worry when you know more, and until then keep it easy and enjoy spending time with your little kitten. For all we know it might just be some small hidden inflammation (which causes a fever) that's just being annoying Keep a good eye on her and try visiting multiple vets if you can to get a good diagnosis. More vets do see more than one, of course. But until you know what it is, try to not think about FIP.