My father's oxygen drops just by standing up from his bed. It's not looking good. They think he might have a lung infection, but they're not 100% certain. He is being treated with antibiotics. If his breathing does not improve in the next day or so, they will conclude it's not an infection and that it's the progression of his disease. He also has headaches.

He was too tired for us to visit yesterday, so we're headed to the hospital to see him today.