take her to the vet now. It could be a stroke or a tumour or any number of things. I wouldn't wait it out..get her to a vet.
Yes, it sounds like she's in a great deal of pain. Definitely take her in to have her examined. (Disorientation could be from stroke or poisoning causing neurological impairment...but commonly what you described indicates a high level of pain).
VET asap! It could be lots of things, but the walking in circles and glassy eyes sounds like symptoms of a concussion. Cats don't always land on their feet and lots of them climb dangerous places. If she fell when you weren't around you wouldn't know. Concussions are very dangerous, but very treatable. Go now!
Thanks guys, they said it was a brain tumor. She will most likely be put down next week.
I'm sorry to hear that. I hope you're both managing well enough. stop in to chat if you feel the need. As cat owners, we know they aren't "just pets".
so sorry to hear about your cat.