Advice regarding fever. Please help.

My mom got fever on 27th April and she tested covid positive and she started taking medicines ivermectin,doxy,zinc,vit c and still she was getting fever so some blood test also done in which Crp was 62 and hb was 9.8 and x ray was showing accentuated markings seen in the bilateral lungs. Our family doctor started some medicines like ceftum,levoflox,medrol 32 mg twice for 3 days,16 mg twice for 3 days and 8 mg for 3 days. In these medicines duration my mother did not get any fever however after one day she again got fever 99-100 morning and evening. She started taking crocin but after medicine time she was getting fever again and again. Our family suggested some test like lft,kft,cbc, typhoid,malaria, dengue all are normal but x ray was showing same line accentuated markings seen in the bilateral lungs but our family doctor said that everything is normal and started zifi 200 mg and azee 500 mg and medrol 8 mg once a day for 5 days but my mom is not getting any relief and getting fever.