sinusitis has cleared up except feeling malaise, joint pain?

61 healthy ns male. have had 2 sinus surgeys in the last 15 years , at least once a year plaged with sinus and bronchitis problems. first get a cold then bad cough with phlegm and then it turns to sinus , green stuff from the lungs and green from the nose . no allergys . this time cough cleared up after 2 weeks but sinus kept going , on second round of antibiotics now , never a fever . it has been a month and it seems like everything has cleared up except i am still feeling malaise, sleep, sleep ,sleep and no energy ! even my joints ache like i got the flu or something !! and help !