A year ago this month, I went through the same thing.
My mom stopped drinking water on her own, she slowly deteriated. One day she was fine the next she couldn't keep her eyes open, then fell asleep, she was in kinda a colma, she stayed asleep for 7 days without food or water, then woke up, (called the surge of energy) if this happens, take advantage and tell your loved one eveything you want to tell them before tey lose this energy, because it may be your last chance.
My mom woke and for 2 whole days I had my mother back, then on the 3rd day fell into a deeper colma, again no water or food, and days later she passed away.
I am still dealng with the loss, but because I took the time and spent every waking moment with my mom in her last days, I feel a closeness, a bond, and some closure.