Thanks, everyone. @Joannie - I may well need more details when I'm further into it. Some days (just before surgery) I felt such a fraud not being at work and then I'd fall in a heap over something or nothing. I've put a lot of energy into making my job interesting and being someone who can provide assistance and I guess that I'm worried about losing that ground as well as being bored. But I also know that with work, all of the driving, and looking after the family, I'm shattered at the best of times so I realise that there's going to be periods when I just can't do it (as does my doctor). It's so stupid that it has to be set up this way because I bet there'll be times when I'm perfectly able to go to work or maybe just bring some work home.
It is reassuring in a weird way to hear that some of you Superwomen (and you're all that in my mind - capes and all) have taken time as well. Maybe I'm not a complete wuss.