111 for my 18 month old DS? He has been poorly last few days, at first I thought it was teeth as he does have a couple coming through but he's been burning hot (temp around high 38's) even after calpol, refusing food normally a brilliant eater altho still drinking, very sleepy (but not un-stirrable) and generally very sad & clingy. He's asleep in just a nappy cause he's so hot but no open windows/fans etc but is it best to get him checked/some advice or am I being OTT?