My 5 Year Old Son Has Thrown Up Almost Every

My 5 year old son has thrown up almost every time he eats for the past several days. Initially, I thought it was a virus, but he seems to feel ok and it's lasted longer than I would expect a virus to last. Also, it seems like he's always had some sort of digestion issues since he was born. Is there anything I should try or should I just take him to see his pediatrician?