DS is 2.9. He was out of sorts yesterday and has had a slihgt cough for a day or two, today he has been feverish and sleepy, not wanting to eat much. A little while ago he asked to go straight to bed so I put him to bed with a does of medised. THere's no rash, no sign of a headache or shying away from bright lights - is there anything else I should be worried about or is this just a little bug?