i have just had a stomach bug and went to the doctor. he said it was a viral thing and that it wouldnt hurt the baby whatsoever. he said to eat a bland diet (no dairy etc) and drink lots of water and gave me two days off work to recover. he also said that if the diohrea got worse that i coud take 'panedine' as it has codene in it which binds the stools together (TMI). go see your doctor for peace of mind, if anything else.