School after a long haul

It's finally school again! He stopped school since Wednesday as advised from PD. It is frustrating that he had to stop school as he was already showing improvements. But we don't have a choice as he was not well since beginning of December!
Today he woke up only at 925am and did I mention school starts at 9am? It may be due to too much fun he had over the weekend and he woke up twice in the middle of the night too. He was super cranky and clingy when he woke up! (Maybe becoz I try to wake him by taking out his pacifier? ;p) We managed to rush to school after his milk, wash up and medication, reached at 1010am. It's indeed quite near to our place.
He said "No.No" when the cab reached school. Called out for "PaPa" when Teacher Wang carried him. Cried when we bided goodbye! I really hope we don't have to go through this again. For the whole month of December, he never attend a full week of school. The most was 3 days consecutively. How to go on full day when he cannot even adjust to half day!?
I think I am so stressed up about his schooling issues and should take it easier and give him more time. Lower the expectation and thus not so tensed up everyday! Maybe expect to start work little later too. Pay little more for his fees as I will not have the working mummy subsidy in this case. I think I am too eager to contribute to the family too. Keeping my fingers crossed that all will turn out well.
Will pick him up at 1145am later.
He was still tearing when I picked him up. His right toe was bleeding and I am sad to say that no teachers noticed his injury.

They said it may to due to the outdoor play but nonetheless I felt that they should be more attentive. I meant they should have checked each child after the outdoor play. Definitely he will cry when he was hurt but no teachers take notice to it. Not blaming anyone but things can be improved. I would have felt better if any teacher notice and let me know that my child is hurt and how and when.
Aside all the negative, he took half serving of lunch today! That is something to cheer about.
Hope things will be better after feedback to principal.