I went to my first check up yesterday. I was 5 w 5 days according to o date. They did a transvag. ultrasound and saw nothing at all. They ran my hcg two weeks ago and it was 15. Yesterday, it was 13,000. They will rerun it tomorrow morning. I go in monday for another ultrasound. Everything I read online says you should see something with an hcg that high. How worried should I be?