COVID Query. Worried about the fever.

My father has had COVID like symptoms for the last 10 days. He is under home isolation. He has had fever in the range of 98.5-100 F everyday for the past 10 days. On the 5th day, he also has loss of smell and a bit of nasal congestion. His SPo2 levels are in the range of 97-99. He too Azithromycin for the first 3 days and after that he has been taking Doxycyclin for the last 7 days along with Vit C and Zincovit. He also took Ivermectin for 3 days. But his fever persists. He gets mild fever almost everyday. Today is the 10th day. His blood reports are normal, D Dimer, IL-6 and Kidney Function Tests are also normal. Only is platelet count is ~1 lac which is low for which our family doctor suggested Caripill. Please suggest. We are worried about the fever. Thanks