I'm sorry this is all so confusing. Congrats on the pregnancy and I sure do hope this works out for you. So, this is important stuff. I guess an option to go to another ob for a second opinion would help. It's frustrating to think this doctor is just guessing. Early pregnancy on ultrasound can often be confusing with what at one time appeared to be an empty sac growing to a full term baby. That does happen. But in this case with three things, the slow growth, slow heart rate (declining as well) and the visual of something such as a cyst on the embryo or fluid makes me concerned. They told you what to look for with regards to a miscarriage. But if none of that has started, I'd find another doctor you feel more comfortable and trusting of and get a second opinion. hugs and please let us know what happens sweetie
I would run,not walk to a 2nd opinion. it sounds like machine malfunction to me. congrats on your pregnancy! please keep is updated!