My grandmother has stage 3 lung cancer, COPD and alzheimers, currently we think she might have an infection aswell. For the past 3 days she has not gotten out of bed, does not want to drink or eat anything all she does is sleep. It sounds like she has mucus in her lungs and throat but can't cough it up. In addition she is loosing control of her bladder and can barely stand up on her own without getting shortness of breath and going into a panic mode due to the fact she cannot breath. It feels like she is near the end, how long do you think she has left?