Our baby has similar symptoms to yours. We tried Gaviscon Infant and it stops his spit ups as he spits up constantly and a lot! He had some constipation with it so we gave him a bit of peppermint tea (a very small amount) on the advice of our GP. This seemed to calm his tummy a little and it made the constipation better as he was a little dehydrated too. I think our lad has a very sensitive digsstive system still as he sort of struggles against the feed (he is being formula fed) and we might try him on a reduced lactose formula to see if that is the problem. It is hard though when you're not getting any sleep and your baby cries all through the day, you just want to pull your hair out. I know the feeling!!!