Wow, your story really touched me, as I was never thinking that what we have here are really humans with real problems and lifes, and yours is impressing. I had a lot of people touched by Alzheimer’s in my family and most of them were men, rarely women which is pretty discouraging also... They also left us some stories to be told and some memories that we only can remember, but also the power to value what we got now.
I can relate to almost all that you said, even if I wouldn't like to, and I honestly hope that you will be strong in this period of time, because whether you are aware or not, you make the examples that your son will follow most of the times in his life.
Reading this made me remind the fact that I may not be living the life that I want, and that I should try my best to build a better one for me and for the rest of the others that I can help.
I really wish you to go well through this period as it is not that easy at all.
Take care!