At pick up teacher said son was very upset at lunch and after buy not willing to tell anyone why, and saying he is not ready. After some time he said to the teacher and I that it's to do with not wanting to do some activity. Now at bedtime after me making jokes about not wanting to do the activity he said it wasn't that, he just said that and he is too scared to tell me why he was upset. After a lot of pushing he said he peed in a bin at the toilet school, but I worry that there could be more to it, like someone asking him to do this, more than just peeing in a bin happening etc. For now I've said thanks for telling me, promised not to tell anyone and said that if he remembers more, he should tell me.
Feel worried that he had made up lie (activity) instead of saying what had happned. Also if it was just peeing in the bin why would he be so upset about it and want to keep it to himself. I also feel he's leaving out details like who else was there and what did they say, ie did they laugh etc (he says they said nothing). For background he is struggling a little bit with boy relationships in primary, including recently an older boy from his composite class putting pressure on him to do /not do things /spend time just with him etc.
Am I just paranoid ? What other questions to ask tomorrow, or what things or red flags to look out for.