I was 1b1 and had a radical hysterectomy on 12th Dec. Firstly, none of your questions are daft and the nurses are there to answer them. You can also ask questions here and the very lovely forum has lots of really sensible, wise and kind people who might be able to reassure you.
Secondly, I think it's pretty common to feel totally wiped out, even at 1b1. I know I was! To be honest, I'd been unusually tired for months but battled on, trying to get a grip. Once everyone knew it was actually cancer, I didn't have to struggle on any more and gave into it. Make the most of it! One day I will be well enough to clean the guinea pigs out again but I'm making the most of people's low expectations of me for a bit!
I also interpreted every little twinge as cancer. I think that's pretty common. ;) Hang on in there and pm me if you think I can help. Sending you hugs!