Vomiting cat help

I have an 8 month old cat. Tonight he seemed fine was playing and sleeping with me on the lounge. I moved us to go to bed and he suddenly vomited up his food. He then laid down to sleep but didnt seem very happy and wasn't puring like usual. About an hour later he got up again and vomited up 3 more times but there was nothing but bile/liquid and he used the litter box and went back to bed. He has a dry nose and still isn't purring. Could this be just an upset stomach. My nearest vet is an hour away

I think he seems ok this morning so maybe it was nothing

He could have gotten into something he shouldn't have and it upset his tummy.  even eaten a bug or something. 

Glad he's better this today.