Lucy has had a runny bottom since Friday evening (TMI alert) its very pale almost korma like & has been getting worse/thinner, today its more or less just liquid.

She is still eating, although not much & is still drinking too...she did gag this morning at breakfast & later on eating half a banana.

I know there is a stomach bug doing the rounds at the moment & apparently its spreading like wildfire.
How long would you leave it before calling a doctor?