Jeza, I'm pretty sure I've said before that you will be of no use to Mic if you get ill too. You need some time, however short, to have a break. I only looked after himself for about two months (tops) and he was mobile, etc - it was the mental exhaustion/worry that did my head in (oh, and the tablets every three hours). Maybe you need to be looking to the future a bit, you can't carry on without a break indefinitely (I'm not saying you should put Mic in a home). Is there a support network of some kind that you could access (maybe on the net), where you could speak to people in a similar position to see what your options are for getting some extra help so that you can have a little break (even a couple of hours a week)? In the meantime, come on here and vent some steam – there's always someone to speak to.