ultrasound but only say yolk and gestational sac

Marissa
I had my first ultrasound done today , they weren't able to see anything other than the gestational sack and egg yolk.... my first positive (but very faint ) test was done on February 6, the doc said it still could be too early to see anything but that there is a 50/50 chance of a miscarriage. I'm super upset right now , I have to go back Monday for blood work and then Tuesday they will compare the HCG levels from that they took today , they should double and if not we will need to talk about options . My first date of last period was Jan 4 , but I know when we tried to conceive which was on Jan 28 which would put me about 6 weeks or so . Has anyone else been in this situation and what was the outcome ?