Congestive heart failure. And scared.

Hi my mom suffers from congestive heart failure which causes fluid retention.she is also diabetic on insulin and has thyroid but under control. The problem is there are these big endocrinologist and cardiologist that she ks reffering to but nobody gives time as theyre super expert and super busy. She takes lasix for fluid retention.problem. It drains her of all.energy,now how is she supposed to fill.up on nutrients taking into consideration diabetes also. I feel.her magnesium potassum all.levelz are going low. Which will further deteriorat her. Kindlt suggest as how to keep her body with some energy as electrolyte can help but will.build up.fluid again. Any right direction would be appreciated. I feel hopeless and scared.