It is said that the younger diagnosed, the faster the disease progresses, but that is not always true. My SIL was 55 and died 9 years later. My FIL was around 65 and went over 20 years. My husband was 60 (70 now) but I now know it was early signs that cost him his job 4 years before. We had a woman here whose husband was in his 50s I think and was gone in about 2 years. Others who have been diagnosed young but progressed slowly. But, it is generally believed the youngest onset goes faster. Probably a different cause that attacks the brain faster.
As they say: if you have seen one Alzheimer's you have seen one.
I think it's important that we feel sorry for ourselves at times. That's important when we consider the two opposite edges of that: not feeling anything because the strain has pushed us that far, or having very heightened feelings about everything because the strain has pushed us that far.
The fact is that it doesn't matter how we're coping at any given moment so much as that we don't lose the perspective that with both the events and the time, the strain of this is very real and is more than enough cause to hit the walls on both sides of any range at times.
If we look into anyone else's story here, we can better understand that it would be heartless not to feel sorry for ourselves at times. The wiring is different for different folks though, and some people don't have or listen to emotion or feelings as much. Some people live in their feelings and emotions. It's not better or worse, it's just that human beings have ranges in all kinds of things.
The bottom line may be that if you're reacting to this at times that just has to be normal with a human being under long strain.