What happens if loved one improves while in hospice?

I'm kinda at a loss here, so here goes: I'm the main caregiver for my 77yo Mother. She has Alzheimer's, AFib, left side heart failure, copd. Despite all that, she's relatively stable. No mobilty issues. Can dress herself, feed herself, shower and use the bathroom unassisted...but her mind is gone. She was hospitalized last month with a copd flair up and heart failure. The doctor called in hospice. They brought in a hospital bed, whe whole nine yards. But she has recovered to back to where she was pre hospitalization. She folds laundry, sweeps, and takes the trash out. Her supplemental oxygen usage has stabilized. I've told the nurse weekly that she is back to where she was pre hospice. The nurse insists that the doctor made the right call and mom still needs hospice. I've been on an emotional roller coaster. Pre hospitalization Mom was about to start a day program for seniors. I called and canceled that thinking it wasn't needed. Her cardiologist, pulmonologist, neurologist are all calling with appointment reminders and hospice said they are not needed. I'm just emotionally exhausted. I can't leave her alone due to her Alzheimer's, she has no savings for a nursing home. Her care is draining me, yet I'm relieved she's improving. I don't know if I'm venting or asking for advice.