help! ds woke up this morning with a red bottom and blisters. is this nappy rash? he's not had anything like it before. I guess it must be either nappy rash (he did have a dirty nappy this morning), or a reaction to the swim nappy we used yesterday, or a reaction to food (just started weaning). any ideas anyone? do I need to do something to his nappies (antibac wash or anything?)