I am a 62 year old female. For the past 8 years I have been getting bouts of extreme fatigue, headaches, nausea, diarrhea, sinus congestion and feeling ill as if I had a flu type virus. I have had all sorts of tests and they have all been normal. My last colonoscopy and and stomach scope were also normal. I'm due to schedule another colonoscopy soon. I am now diabetic, but not at the time this all started. The symptoms don't appear at any certain time of month. I don't take hormones although I did eight years ago. I am at my wits end. It's difficult to make plans because I never know when this is going to start. One year, I went three months with no symptoms. It was great. Please help!!