Hi Shawneric, thanks for taking the time to post. She basically goes to bed at the same time each night around 8.30 which is basically 2 hours after dinner. If she stays up later like when we were on holiday she was still sore. Her pain is there each night, whether she has had school that day (I home school) or whether it is weekend or holiday. Yes, the pain does go away when she finally goes to sleep, on the odd occasion - once or twice a month approx, she wakes to go to the toilet at about 1.30-2am and is sore and can't settle again for another hour. She won't let anything near her tummy, not a hand to rub it, or a hot water bottle or a heat pad, she can't bear a waist band around her tummy - she is too sore. During the day she is absolutely fine.
Before Feb last year, she was one healthy, happy kid. Not a worrier, nor a stressor.
I have a little theory: pain makes you stressed, no blinding revelation I know but if you weren't stressed before you had ibs you are/or will be now. She is pretty amazing at coping, but does get grumpy with us when we can't do anything to help, and we do what we can and then leave her to go to sleep listening to her music, because we have found tha tif she gets over tired it makes everything 10 times worse.