Need Advice Urgently

So I have a trip in my college where we will go to like a tourist spot it's 2 days and 1 night anyway I asked my mother for permission and she said yes and I sent her all details of the trip I also asked her again before paying for the trip and she said its okay to go
Fast forward to an hour before the trip and she is calling me and checking if I got everything and she asked if took pyjamas I was shocked for a second and then I said yes but the problem is it is 2 days and night all in the bus and I feel kind of guilty but I can't cancel now also I want to go