10 weeks since LMP but sac is measuring 2 weeks behind. Doc cant find a fetal pole, yolk sac or heart beat.?

You should ask for another scan. Were your scans done viginally? When i was 7 weeks they did a scan via my stomach and couldnt see anything at all again at 8 weeks could only see a sac. My uterus was tilted towards my spine so i requested an intetnal ultrasound and they seen a 8 week sac fetal pole at 150 beats per min heart beat. Dont give up hope ask for another scan