I'm worried about my cat...

She's been completely discouraged since the beginning of the week. She won't even get up to eat... We tried offering her her favorite sachet, but she won't even touch it. She's weak, you can tell. She's usually very affectionate and wanders around the house, but now she doesn't even meow anymore, much less get out of bed.

I haven't seen her since I woke up, and she usually stays on my bed or in the living room, but she's not home...

I have no idea what's going on with my cat. I don't want to lose her at all :(

She's been with me for 8 years; she's practically my daughter. I don't want her to get sick...

My sister will try to take her to the vet when she can. I hope everything turns out okay.