Reflux

My LO is 13 months old and the last month has been suffering from awful reflux with all foods and liquid. I’ve contacted the doctor many times but they just don’t seem concerned unless he’s loosing weight or showing signs of dehydration. I have to keep a diary or what he eats and when and when he is sick and how many times. Has anyone else experienced this? It’s come on out of no where and getting worse as time goes on. I’m really worried and concerned for my LO health.