My 2 1/2 year old has recently had the stomach flu- vomiting for one week and diarrhea persisting beyond that. His bowel movements are still unpredictable- some solid, some not. He is eating and drinking well now, but I've noticed his tummy is really distended- swollen and firm. He doesn't complain of pain, even when I push it, but it is noticeably distended. Is this a normal after effect of the stomach flu or should I be worried? Thanks for any info/experiences!