Razz berry has said most of what I would, reflux is caused by the acid either too much bring produced and/or it rises up out of their tummy. Foods don't cause the problem but can irritate the lining of the tummy causing more pain. We ended up using Zantac and then losec until ds was 18 months. His symptoms were unsettled when lying down, coughing, husky voice and it got worse with teething. You should seek help from your gp.