Hi All,
Kujo is 7 months, and he was fine all day, ate fine, drank fine, and for the past few hours he threw up white foam (looks like human spit) about 3 times. He is kind of just lounging around now

Could this be anything serious or just an upset stomach?! First time dog owner so im nervous.. I cant take him to the vet because its 10PM here...!
Suggestions..?