About once every couple of months DD2 (2yo) will get sick at about 10 or 11pm. She'll continue to get sick and/or not be able to hold any fluids down until about 1am, at which point she'll settle down and sleep relatively well (usually a couple of wake ups for a cuddle). The next day she's off her food a bit but generally in great form with no other symptoms.
She often has a runny nose/cold when it happens, but then she frequently has a cold without it happening. She has food allergies but there's no indication of her having had anything containing them.
I'm at a bit of a loss. It's extremely distressing for her, exhausting for me and I never know whether I should be keeping her home from daycare or not (I always have up to now, but considering she's fine the next day & if it related to the phlegm maybe it's not entirely necessary provided she's in good spirits)
Has anyone else experienced anything like this? I'm doubtful it could be a series of bugs as it happens so often and nobody else seems to get sick, and I'm beginning to be a little concerned that there might be something else going on that I'm missing.