Went for ultrasound this morning to check my lining. (Transfer date is planned for 2-26) The nurse saw a small sac thing inside my lining. She didn't know what is was. I am going back to this afternoon so the doctor can scan me himself. Then we will know how to proceed from here. Has anyone heard of this?? Please say a little prayer for us. I am so scared that something is wrong, especially since the nurse did not know what it was. I do not want something to be wrong with me and I do not want this cycle to get cancelled.