6 month old keeps throwing up

My 6 month old baby keeps throwing up. In the morning he ate fell asleep and wokeup throwing up i bathed him waited 3 hours until i gave him another bottle and an hour later he threw it all up since 1.30 he has not had a wet diaper. Hes really tierd and is sleeping right now. What should i do? Im going to try to give him another bottle when he wakes up but if he throws it up also what do you recomend?