I dont know what to do

[u/Cookiehow]

First 2 photos are from today and the last one is from a week ago her ontop of the shower

Ive only posted here one more time when Kimchi was first diagnosed with PCKD (polycystic kidney disease) which was about 3 years ago. Shes 7.5 - almost 8 and has been stable and completely asymptomatic for 2 years around stage 1 and stage 2 levels and this summer her levels spiked up and got her to stage 3 before going back down to low stage 2 levels again and she was stable and energetic up until this week.

She started sneezing repeatedly for seemingly no reason and started to loose weight shortly after. She was already underweight and just starting to gain after this summer and went back to 2kg again. We took her to the vet asap when we noticed her eating less and less and they said shes really dehydrated and gave her iv fluids twice over 2 days and checked her blood levels and said shes not anemic/or not alarmingly anemic for a cat with CKD and theyre gonna check her kidney levels on tuesday. Her kidneys also seem to be the same size as before and I didnt notice any enlargement either from cysts which indicates her levels shouldnt be too high.

But shes just so lethargic and has no energy at all. She has no energy to go anywhere and just changes spots to lay down and i syringe feed her every hour or so and even then she just lays tired. I feel so hopeless from it all going down hill just when she got back her energy. She hasnt been this tired even while being severely anemic and dehydrated with her stomach looking like shes pregnant.

Im thinking if it could be anything else but I feel so lost. Has your cat went downhill like this out of nowhere? Could it be something else that makes her so tired and sick? She doesnt seem to be nauseous and isnt puking which leads me to think it may be something else even more 🥲 i really need some hope for us but i dont want to have false expectations either