Yes, I agree about it not being true most likely that you aren't doing anything for them. I'm sure you're loving them! I too have a chronic illness, so I totally understand about feeling the shortcomings of that, the helplessness, but unfortunately some of us are dealt these hands and we have to play them.

Try not to focus on their disappointment and remember that they are kids. They will be disappointed about a lot of things (not getting that toy for a birthday etc.) that won't "matter" when they get older. They will be able to understand what you're going through eventually, so for the time being, just do what you can.

I struggle on and off with a chronic illness and though I'm lucky enough to be able to work (and work from home as needed) I understand how illness can affect how you feel about yourself and your capabilities.

I'm sure it's not true that you can't do anything for your family. Taking care of a family is work all its own and I'm sure they love and support you for who you are.

Might it be possible to focus on something you can do today, rather than what you can't? Sometimes that helps me get through just in the moment.