I'm a 65-year old woman, I am a previous stroke patient but fortunately I recovered. But all of a sudden, I lost my appetite and I seldom eat. During the first week that I lost my appetite, I lost some weight, but during the third week up until now, I losed excessive weight. I was able to undergo laboratory examination, and there we're no findings saying thay I have an ailment, but the doctor advised that I should keep my sugar level now. I'm having mild fever at nights and I don't know what