DS4 is worrying me today, he woke up at 10am normally up at 6 and then just sat on the sofa all quite normally he's running around etc and kept asking for drinks. At 12 he was fast asleep again and he's slept all day but wakes in-between like gasping for a drink. What could be up with him? DH said he's just tiered from school? He says he doesn't feel unwell. But I'm sure its not that, I'm worried.