Help :(

Fillegirl25

So went today at 6W, 6D for another ultrasound. My levels have been doubling but low and I have a sac. The dr. wants to stop all treatment (IVF) pregnancy. She doesn't think this is a viable pregnancy b/c they baby hasn't been detected yet. I don't know my HCG levels so I don't know if they went up or not (find out this afternoon).  I went into this not expecting anything since this was a frozen cycle and the chances are lower than a fresh, but none the less I am worried if there is a possibility if I should stop the meds. I am sad and confused. Can anyone relate ?