I'm really worried about my dad. He's 73 and just got over COVID about nine days ago. For the first five days, his oxygen levels were stable at 95, but then his blood sugar went up, and the doctors said it's from the steroids, even though he's not diabetic. He was treated for around four days, and now the sugar and blood pressure are under control. But his oxygen levels are fluctuating between 86 to 93. Should I be thinking about taking him back to the hospital, or is there something else I could do at home?