Is it normal to get nervous before supervisor meetings?

While I personally don't get nervous before meetings, I know plenty of fellow PhDs who do, and fit exactly with the cycle you've described of manically working the few days before because they're convinced they haven't got enough to show for the time since the last meeting. So I don't think you're alone in that at all.

As regards this specific meeting, mention that you've been moving house etc., I think any supervisor with an ounce of humanity could understand that perhaps you didn't get as much done as you would have liked under those circumstances; it's a stressful time! Plus, have I read correctly that you're only just beginning the PhD? In that case I wouldn't feel guilty at all. Sure, it's nice to get some preparation done, but officially you haven't started yet, so to criticise you for not having done enough during a period when officially speaking you aren't even on the programme would be unfair. My supervisor (I have the same one as I did for my Master's) told me to go on holiday & relax for a week or two before the PhD began, after a stressful Master's year

For other meetings, I can offer some advice from my own experience. My supervisor tends to get distracted during meetings, and so a former student of his told me it was a good idea essentially to draw up an agenda for myself before heading into meetings, so that if there was something I really needed to discuss, even if we did wander off-topic, I could jog my memory by looking at my notes. This could be a useful strategy for you, because you could lay out everything you've done/read before the meeting starts, with maybe a few bullet points for key ideas or things you want to discuss, along with any other issues or topics you want to raise. For myself, I usually divided my notes into reading/sources done, administrative things done/to be done, any applications or conferences forthcoming, and so on. Seeing it laid out in front of you like that can be very reassuring, as you can see clearly what you've actually done (and it is often more than you think, we tend to forget those one or two days spent on some small topic or set of sources), and thus you can explain more effectively to your supervisor. I feel it will help you feel more in control of the meetings, by having something written down. It doesn't have to be long (mine were usually a page or so), and I just stuck it in my diary/notebook, so it didn't look odd when I pulled it out during meetings.

I hope that helps a bit!