topsy, the problem with 'why me' is that you can start thinking 'did I deserve this in some way, did I do something wrong?' - and of course nobody deserves it. Of course there are some things that might make you more at risk, but then again there are plenty of people who fall into the at risk categories that don't get it.
We've all heard stories about 90 year olds who've smoked fifty a day since they were 10 and are still going strong 
My thoughts are, it's a random bastard that just happens to get you if you are unlucky.
Unless you have the genetic variety of BC, they usually say 'it was a random mutation'.
But do ask them about such things, they might be more forthcoming than my lot were
and it sounds as if you want to talk it over, and so it will probably be helpful for you. Fingers crossed everything goes ahead for you tomorrow
xx
MAS - now everyone can make haddock sandwiches
- actually those ones look a bit more palatable, the one I had was just haddock and something sort of creamy tasting which might or might not have been mayonnaise, rolled up in a sort of swiss roll of bread. YUM!