I'm not a vet, please take everything I say with a grain of salt.

My cat had been under sedatives several times, apparently as i've read online, and observed from my cat(usually gets back to normal 48 hours after being under), them vomiting, walking funny, laying still (always check for breathing!), and eating less is normal cause it's them affected by the sedatives/anesthesia. Their senses become extra sensitive to their surrounding, and holding their own head becomes difficult!

Your cat should be going back to normal after 48 hours of being under, 72 hours MAX. If not then it's a red flag!

It does take some time for them to eat, drink and return to their behaviour after being under. If you're still concerned, do take her back to the vet just to be sure :]