My Daughter Discharged Something Vaginally That Has Everyone Stumped. She

My daughter discharged something vaginally that has everyone stumped. She even went to the ER. She had about 20 minutes of the worst cramps ever. Then went to the bathroom and felt two objects being expelled. They were quite large (bigger than a quarter), membranous and air filled when expelled. Shortly after they came out, they "deflated." There was some tissue and blood attached as well. They were both pale in color, not red or dark in any way except for where the tissue was connected. She bled a little bit afterwards and then it stopped. ER docs did not know what it was and referred her to a gyno. We made an appt but looking for answers if you have one. I do have pics if I can get them to you. Thank you.