I'm really worried about my father's health. He's 56 and just had a CT score of 925 at the end of April. His CRP is 40.5 mg, serum LDH is 823.1 UL, D-Dimer is 319.92 ngmL, and ferritin is 769.63 ngmL. His oxygen levels keep fluctuating between 90 and 92, occasionally hitting 93 or 94. He started on steroids and anticoagulants from May 1st, but before that, he had dexona and deriphyllin for about one and a half days at the end of April. What should we do next? Is there anything specific we need to watch out for or ask his doctor about?