severe reflux babies and starting purée foods

My baby is 4 months in a few weeks, we just made the May baby section being born on 31.05.16. My concern is he has severe reflux and vomiting, he's on a lot of meds. Domperidone gaviscon and liquid omeprazole. Not that they make any difference really. But he thrives well and gains weight. Has anyone else been through this and what was your baby like when you started purée foods? Any advice would be gratefully appreciated