I know how it goes and it stinks. I have 3 boys ages 11, 7, and almost 5. I couldn't hide my being sick but I didn't tell them the whole ugly story. And I won't until they are old enough to understand it. I have told my kids age appropriate information. My oldest knows more than the other 2 but not enough to scare him. He knows I'm sick and I can't always go and do things. We changed some of the stuff we do so that I can go with them. Instead of doing a 2 mile hike, we go for a walk in the park and go fishing instead.
I try not to worry about what will happen and concentrate on things I can control. I cut down to working 2 days a week instead of 6. I am really lucky too. I have my extended family around me all the time. My parents, brothers, sister and cousins are always around when I need help. AND most importantly, I have my husband to pick up the slack.
You need to find a balance. And don't beat yourself up when you drop things. When your tired, don't carry heavy loads. I have taken to sliding my laundry basket full of wet clothes down the stairs to the back yard to hang them out. Do what you can within the limits your body is putting on you that particular day. And let everything else roll off your shoulders. It's all I can do.
Heather