After I celebrated, cheered & did the jig that Andrew is back in school, I made extra effort to observe his reaction in school, and talked to the teacher to see how he is adjusting.
The first week was rough, he's in nursery so school started earlier, he would cry unconsolable at night (is it due to keeping up a good front in school- no crying?, stress of new environment?). He even said he did not want to go to school, so I talked to his teachers and they said they would pay extra attention to see what's going on. That was three weeks ago, and thankfully things are back to normal, and he is looking forward to going to school again.