Reflux question...experienced mommies?

my 12 day old son has reflux and he's on zantac . we had him checked for pyloric stenosis before we started to make sure that wasnt the problem...it was fine...he is still projectile vomiting a lot...he's on milk supplemented with soy formula..we've done everything they told us to do. he actually heaves like we do before we vomit...any advice on how to help him not throw up so bad...did anything inparticular work for your child?