Reflux

Hi, my mum is 74 and was diagnosed 3 yrs ago. Mum’s mood has changed, she is low and tearful all the time. She finds it difficult to eat, always feels full, has a bad taste and seems to have reflux a lot. Porridge with flaxseed is her go to. Has abyone else experience of the reflux and if so can you recommend anything? Mum also has diabetes and it might be that. Sharon