This just happened to me. I went once for an ultrasound at what should have been 7 weeks, saw fetal pole and a normal sac an then yesterday with no advancement. I should have been 8 weeks and there was no heartbeat. Just had a d&c this morning. Im doing well. Im 28 and it was my first pregnancy too. I guess it wasnt time yet. Good luck...If u need a d&c i can tell you that mine was cake...