Mom has been on Hospice a month now bedridden, feet and legs swollen fluid on lungs. How long does she have?

She's coughing like crazy has CHF and HF. She still has her appetite..not much of one...feeling and everyday not hurting so she says...me and my sister are with her 24-7..bp really high and she is really she said she is waiting on the good lord to come get her..its been hard but we are making it thru...wondering long she as...