Hello Dr. Rynne, Recently my daughter-in-law who is 4 months pregnant has been coughing up blood, about 1/4 of a cup when it occurs, she has no occurrence of nose bleed; it accumulates in her throat, feels like she is chocking, lacks air, then starts coughing up blood. What could be causing this problem? We are all worried about this. Waiting for your reply and thank you, Theresa Anderson