hi, I feel realy cold, with shivers, but I know I am hot. I have been sweating all day working in sun, ( I work in construction) but have felt cold for 3 days now. I have also tried eating and on all 3 days have managed just a mouthful of a sandwich, and then feel full and sick... which realy isn t like me after a long day at work....please advise, because apart from symptoms I mention, I feel ok. apart from tired.