Memoo, it is a very frightening experience. Fortunately you are not alone, although there will be times when it feels like it. May I say with the utmost sympathy caring for a terminally ill spouse is not the same as caring for a chronically ill spouse. I'm sure of course that all carers in the first category wish their spouse's condition was chronic but it can be very daunting knowing this could be for the rest of your own life too.
Carers UK used to run a really good course for carers which I'd imagine has been cut for funding reasons but I will look and see if I can find any information about it.
What I have felt more than anything since it began is shut off from the rest of the world, from normal couples who can go out and do things, or jump on a train with the kids, or go on holiday without agonising over every difficulty. Like most of us, I know no-one else in RL going through something similar. Everything I do in my life is limited by DH's illness. As ds is getting older, I am not prepared to accept that for him and I feel there may be some understandable hurt coming when I say I am going to take him on holiday without DH, for example, so that we can just do things without it all being about the person in the wheelchair.
I guess it ultimately creates a very unequal relationship. That's an enormous thing to adjust to in its own right, on top of navigating the horrendous world of health and social care, the difficulties you may encounter with your own health as a result of caring for another (so lifting, for example, or depression) and during which it is simply not reasonable to expect the other person always to be grateful for your efforts. It would actually be cruel to expect it.
Sorry - I think I've painted a very bleak picture above, but I think you wanted unvarnished truth. Keep posting, you aren't alone.