When I arrived home from work today I found my 4 year old oriental cat had vomited. She also did not get out of her bed to greet me which is unusal. When watching her walk she is losing balance. When sitting, she swaying slightly and her head is tilted and her right eye is semi closed. Yesterday she had a swelling on her mouth which has now reduced, and I put that down to her fighting wih her sister. Now I'm wondering if it's related or worried if it may be a mini stroke? Should I try and get an emergency appointment with the vet or monitor her? She's eating fine and purrs when comforted and is also alert when called. Any advice would be greatly appreciated.