cat acting strange.

My energetic cat who is always begging for food is acting lethargic, refusing to eat, and has thrown up twice, just food and a little hairball. His third eyelid showing the tiniest but but usually they're never visible. He's resting now and he seems to be breathing a little deeper and faster than usual. No idea what it could be but he's not acting like his usual crazy self. Any ideas?

It could really be anything. Sadly, cats tend to have the same symptoms for anything plaguing them. Your best bet is to go to the vet and have them check her out. Wish I had a better answer for you! Hope he recovers quickly. 

Thank you for responding we kept an eye on him all night and this morning he's completely back to normal. Can't explain it. Must've eaten a bug he shouldn't have maybe.