... One week after total knee replacement, hospitalized with double pneumonia. Since then (3 months) even with antibiotics, have had low grade fever and night sweats,chest pressure and difficulty breathing,rapid pulse(108-130 resting),fatigue etc. Tests for heart problems,valley fever,blood clot in lung are negative. Chest x ray shows a lemon sized nodule (l) side lung. Dr. Says... (1 replies)