Symptoms include, fatigue, especially after even the lightest of activity, light headedness, loss of appetite, joint pain in fingers, confirmed as osteoarthritis, mental confusion and inability to concentrate, irritability. Have been tested for rheumatoid arthritis - no evidence in tests - rheumatologise said there was no evidence of any form of autoimmune disease. Polymyalgia Rheumatica - also no positive signs. Lyme disease and West Nile Virus both also negative. My resting heart rate varies from 50 to 60 and my blood pressure is quite low averaging about 100 over 65. These symptoms have been with me intermittently for eight months. Any suggestions?