Thanks for the encouragements guys. I do really value it.
Qjay - I guess you're saying you hope all my problems are like that because it was no biggie? And if you did mean that you would be right.

Today all was fine and the mum was cool and said she thought we all just got confused, and she is good now. So I was stressing for nothing.

On the other hand, I hope I don't over-react and get massive anxiety every time I think I've done something dumb or weird, or got a name wrong, because actually I am prone to all those things. Also, yeah, I don't usually stress so much and it was certainly partly because of the the newness, the overload and tiredness.
Truly the week has been massive. I am still happy with my kids. I still don't know who they all are - because there are more coming next week I hope - plus where I am, it will always be changing. I always knew the week would be a work overload. One thing I didn't realize is that even after the kids arrived I would have so many meetings and so many people popping in to tell me things and arrange liaison. Basically I have a lot of support, from some wonderful people and that's great, but it's also a lot of extra work at the start of the year.
I have 3 other teachers I meet with who help work in the room during the week, one almost full-time assistant (who is just all instant help - we still haven't had her confirmed for my room though), another assistant who comes in less and whose role is still partly a mystery to me, 4 other specialists to liaise with (eg the psych), 4 teachers who take over from me when I'm released to do other things (eg talk to other teachers), plus the other pre-primary teacher, the other year 1 teacher, 5 admin staff, the librarian and the teacher who helps us with info tech. I actually need to know things from all those people and there are just not enough hours in the day. It is mostly ok, but I feel for the numeracy teacher who had to do a planning session with me after lunch today, because all I was really doing was noticing where it was that I could go back to on the weekend to make sure I actually did what she wants. I have full brain syndrome.
Also, I have a new cold. Also, the plumber came today and finally finished his work and that included replacing a toilet so there is a heavy duty coat of dust over half the house, which I've only partly removed.
Therefore I could easily see Saturday being a time where I collapsed and tried to balance the week with downtime (vege out time), and unhealthy rewards. I could have imagined Friday night being like that actually, but I just went to sleep again instead (for 3 hours this time). Hopefully, I can make sure that my Saturday treats are the healthy sorts of time outs. I still have a lot to fit in to the weekend, and I guess my time out from work has to be high quality rather than high volume, or I will end up stressing about what's not done.
Fingers crossed.