my DD had it a few times, once at 9mths & other time at 18mths old & then at 3years of age (at 3 they can suck on a Hydralite icy pole you get from the chemist shop) ... i took her to the GP 2 out of the 3 times she had it but it wasn't like the GP could give me anything for her.

If it were me i would take her to the Doc tomorrow at least then confirm what it is she has so then you know you are treating her for the right thing (hope that makes sense )

I remember the GP saying she had to have picked it up from someone that has gastro or has the germ but doesn't know they have it yet.

Lucky they are still playing happily, and don't know any different ... just more work for you having to change her more frequently xox