If you are worried, you can always see your GP who will do a poo sample to identify the particular bug that is worrying you. That way if it's something that might last a bit longer (like giarrdhea) they can get onto treating it ASAP.

The other thing that is always useful for the runs is activated charcoal capsules. Not only do they slow the process down and take care of any painful wind, they also bind any toxins and carry them safely out the other end.

Hope you feel better soon, drink lots of fluids or gastrolyte to make sure you don't dry out too much.