My mom got over COVID about a month and a half ago, but her oxygen level is still around 93-95. Should I be worried about this? Do you think I should get her checked by a pulmonologist, or is there a chance she'll just get better on her own in the next couple of months? Before COVID, she had some dust allergies and would often cough, vomit, and sometimes have trouble breathing when going up stairs. What do you suggest I do?