I have flu like symptoms that come and go. When I experience the muscle aches, bone aches, cough with phlegm and fatigue, I can barely get the energy and effort to get through the day. I'm a 58yo female, in good health, had asthma as a child and sometimes an occasional attack. I've been tested for Lupus, thyroid, blood count, Rumathoid arthritis. If this is onset off old age, I won't make it to sixty. There has to be something that is causing me to feel this way on and off.