My 12 year old has had bad constipation n overflow problems so was told to use laxido and sodium picosulphate before bed on Friday night - on Saturday he had lots of soft poo followed by a few bouts in the evening of bad diarrhoea/lots of brown water (tmi sorry) - today he's fine n not been to the toilet at all. What do I do now? Assume he's fine n no medicine n monitor bowel movements? Or give him more? Help!