Nails to the ready - first day at secondary school

I'm not actually here. I'm probably on the bus going with one and only son on his first day at secondary school.
I have cleared it with the boss.  I mentioned the gravity of the big day and said I'd have to accompany one and only son on the bus if 'he gets flakey at the last minute'.  The boss said that was fine and I must do what I need to do.
Of course it's not one and only son who is flakey - it's me.  I'm sitting here at the crack of dawn getting my work done so there's a gap for me early morning if I need to take it.  I've been to the toilet twice and had to force my breakfast down my neck.  My usually leisurely cup of Earl Grey has made me all flushed in the face.  My breakfast has failed to digest and my trousers feel oddly too tight.
We've done enough dummy runs, but I'm still worried.  Yesterday there was a footie get-together at the school for children who wanted to play, so we set off for that.  He was in his sparkling new PE top and looked rather smart. 
For weeks we have ruminated on which bus route to take, but finally decided on one route there because it drops him right outside the school and a different route back because there won't be so many busy roads to cross. 
I lived in a wood when I was little, so my mother had to take me to school in the car all the time.  All I ever wanted was to get on the bus just like all the other pupils.  Anyway, enough about me. But I'm not experienced in the school bus routine.
On the route home yesterday we made sure he knew to stop and wait to see that the cars were absolutely stopping at the zebra crossing before he put a foot on it.  He led the way and did all the right things.  We reached the other end of the road. 
''Should we do it again, do you think?'' I said warily, not wanting to antagonise him into thinking I think he's not capable.
''Yes, we better,'' he said.
So we crossed back, and crossed back again.
I've told him to sit downstairs when he's on the double decker. I explained about the possibility of bullying, so that's why he needs to sit downstairs.  My husband decided he'd better talk to one and only son about what he should do 'if somebody puts his hand on your knee'.  Afterwards, I told him the routine of never to get into a car and if he feels threatened or frightened to run.  That episode of Waterloo Road was quite handy last night because it showed a young girl getting into a stranger's car.  He seems to be looking forward to the new school, but he is the only one from his old school going there.  I have given tips about how to get to know people.  But he was chatting to other boys at the football yesterday so he'll probably be okay on that score.  But I'm still worried.
Is anybody else feeling sick this morning?