Chest Pain. Haven't reached yet?

She is undergoing Covid Treatment and its 8th day today. She is having Chest Pain starting 4th day during Normal breathing and sharp pain during inhaing/yawning, also breathlessness. CRP value was 38.4 in tests done on 3rd day, HRCT score was 5/25 done on 5th day of symptoms and D-Dimer value was 0.91 in tests done on 7th day. She is already on Fabiflu cource and 16mg Steroid along with Doxy 100mg twice a day. Based on D-Dimer value, she had 2 injection of Enoxaparin 40 in last 24 hour since the report came. What could be the reason behind Chest pain and breathlessness when CT score was 5/25 l, where my other known had value 9 or 12 and they don't have any such painful symptoms? Is the virus still even with having medicine? Any other parameters to look for where Physician haven't reached yet?