6 weeks ago started to become weaker as the day wore on...

hello all,
i would appreciate any help of any kind the doctors are at a loss so far , im a 59 yr. old male, 172 lbs for the last 40 yrs. very active in all areas wake up 5am go 7 days a week until midnight, rare to be sick. about 6 weeks ago started to become weaker as the day wore on having to go home by 2 pm feeling bad, then i started getting a low grade fever i run 98.6 and was going up to 99.3-9 for a couple of hours a day loss of appitite but could sit and eat a full meal,this went on for 10 days and went away. three weeks later its back and not going away its close to a month doctors are at loss , blood wk ok , lower ultra sound fine nothing jumping out i have hep c and have had it for 38 yrs. never been sick since no high white count ,no high liver enzymes ? will see a couple specialest on the 10 th and 14th but thats a long way off looking for any light at end of tunnel, this makes me crazy with worry anykind of tip will help, thank you very much