Last Sunday morning at 3am Miss J started vomiting & continued for around six hours & then was fine. Nappies were fine, it was just the vomiting & it went as quick as it came. Now this morning I'm up with Mr Z throwing up. Same thing, has been fine then just all of a sudden vomiting from an hour ago.

Neither have eaten anything out of the ordinary so I have no idea where this is coming from. Any ideas?