Last Rally to Actively Dying

My father, has been suffering from various cancers the last 4 years. First it was bladder, which he went through the treatment and beat. Then it was liver, which again with lazor surgery, he managed to beat. Then last year, was diagnosed with throat cancer. After4 months of radiation and chemo treatment, he had to get total laryngectomy (removal of his voice box) and seemed to be doing ok until they found a spot in his lung, which turned out to be same as his throat cancer - so he's got mestasis into his bones and various parts of his lung now. We tried immunotherapy and after two months of intense treatment, the doctor advised that cancer is spreading too fast and that there isn't much more they can do for him. So after much discussion and heart ache, decided to move him into hospice program at home. 

He's been home under hospice care for 2 weeks 2 days now. Has the 12.5mg Fentanyl patch on for his baseline pain with morphine for breakout pain. He was hallucinating, in/out of conscientiousness and overall very weak. Not eating much (except occasional Ensure drink) and some water. Before the medication, he was walking, eating solids by himself and moving. Then he suddenly just became very weak and sedated. Sleeping a lot.

Then just this week starting Sunday, he woke up and got up from his bed and literally skipped to the bathroom! Then he asked for food and water and sat up with us hanging out with us. It was such a contrast and such a change, I just knew this was his last rally and so I was very upset and couldn't enjoy the moment as much as I should have. Then I had to leave him after a month together to go back home to Europe. Since Monday, he's been the same, some days, not having any break through pain, walking and eating and more or less being normal. The only issue was that he was not able to sleep much. We tried Lorazepam which has worked well for him in the past, haldol (which hasn't worked too well in the past) and giving him additional morphine. Nothing seemed to calm him enough to get him to sleep.

Then after 4.5 days of this active state, last night (Thursday night) he finally started to show signs of pain and discomfort. He's moving from bed to floor to bed to floor. He wasn't sleeping enough and we gave him 5ml of morphine followed by another 5ml in one hour. He's just sitting up and doesn't want to lay down. His stomach is bloated again (he had ascitis and this has subsided to nothing the past week) and his feet are swollen. So we gave him medicine for his ascitis and diabetes. Followed by break through morphine and lorazepam. Then he got another dose of morphine and lorazepam as well. He's just sitting up dozing off but not sleeping and is mouthing something (remember he cannot speak anymore since his surgery so we usually have him mouth things to us to try and figure out what he's saying), but no one can understand what he is trying to say. He mouthed at one point "It hurts so much..." We are devastated that hes in so much pain and is restless and can't seem to get comfortable. 

There really isn't much other symptoms at this point of him actively dying. Breathing is normal. No change in coloration of his feet/hands. Also the fact that he "rallied" for nearly 5 days straight!!

Is this normal? Does anyone else have any examples of such experiences? Please do share. It hurts so much to be so far away from him this week. I am thinking of flying back this weekend or next week latest now. But would love to know that he'll be ok.