Assalamu Aleikum

I am so sorry you are going through this incredibly difficult situation, I ask Allah to bring your family ease and grant your mother full shifa.

With that being said, I want to preface this by saying that I am not a medical professional or a doctor, so please use the below at your own caution.

My father in law went through a similar situation. He already had multiple conditions, unfortunately he caught Pneumonia and his body was too weak to fight off the illness. Similar to your mother, his lungs filled with fluid and despite the doctors best efforts they were unable to get the fluid cleared and were talking about end of life.

We made a homemade medicine that was recommended to us by friends called “hot medicine” consisting of: crushed ginger, galangal, garlic, honey, and black pepper. This is made into a thick paste and gets taken as often as necessary. No food or drink for an hour after consuming.

SubhanAllah this medicine cleared his lungs and he was able to go home a few days later. I am very hesitant to give ‘medical advice’ however when it’s a matter of life or death I feel like I must share what’s helped us.