My kitten is throwing up!?

Hello all! I could really use some help!
I adopted a kitten from an animal shelter a little over a month ago and he went Monday to get neutered and has been fine except for yesterday I woke up to the sound of him throwing up.

He threw up yesterday a couple times and a few times it was just dry food coming up. And the other times it was just a clear liquid. Today he was throwing up again and it was the same as yesterday.

I didn't change his food. And he's acting normal and has plenty of energy.

PLEASE HELP!

Call the vet who neutered him.

Call the vet and let them know.  It could just be some weird upset from meds still in his system or it could be something else.  Try offering some canned food and see if that helps.  Is he using the box normally?

Yes he is using the box normally. I already called the vet that neutered him and she said "it couldn't be from anything we did". He's eating normally, drinking normally and acting totally normal! But will puke every once in awhile and then goes back to playing