The Doctor was so very weak , that he just let take him to the med bay. His body refusing to even fight against her. He was shivering and seemed cold when she set him down, he lets her give him the medicine.
He moves closer and listens to her heartbeat. He seemed a bit confused. "But two heartbeats would mean.. , two hearts. You were born with one I was sure , I am not sure how that can change." He was confused, but he didn't have the energy to think.
Either way he tries to check her over for problems and looks for medicine.