My cat keeps stumbling.

Hi everyone! Badly need your help right now.

I have a mother cat, breastfeeding three one-month old kittens. She has bot been doing well for the past couple days. She does not eat her food, constantly drinks water every now and then, and cant stand on her own/she keeps stumbling.

For context, she has been less active since Wednesday but she was doing fine in the morning. But she picks up her kittens continously (which is not usual of her lately) and i think she's biting the wrong part of their neck because they keep on screeching whenever she does that

Wednesday evening is where she started getting worse. She keeps on stumbling, she cant get out the box properly. She also did not eat her foor if I recall.

This morning, she continue to be worse. I tried feeding her small amounts of dry cat food and even fish, but she just keeps ignoring it and just drinks water. She cant climb up properly.

I included a video here. Im sorry for keeping a bit of distance from her because I'm being wary that she might bite me. She bit my mom last friday. Sorry for the incomprehensible english, its not my first language.

(I apologize for the bad video quality, I had to turn down the quality to reduce the size of the video)