Blighted ovum?

So I go in to my 6 week ultrasound and the sac measures 7 weeks and 1 day. So then he said that his ultrasound couldn't see the baby's heart beat and he wanted to send me to an imaging center since they have better machines. Ok so I go to the lobby and get the referral for imaging center. As my husband drives us home im looking at the referral sheet and it says BLIGHTED OVUM, of which of course I start crying immediately. I dont know what to feel, the doctor made it seem like all was fine and dandy but from everything that I read it is not a viable pregnancy since there is no embryo. My imaging appointment isn't until the 14th and I have been crying non stop. I read my options are to get a d & c or pills or let it happen naturally. I just can't process this pain, I still feel pregnant and I haven't had any pain or bleeding i cant believe it. This would have been our first and i am heart broken. Anyone else go through something like this? Also is it normal that the doctor not tell me and I had to figure it out on my own? He hasn't ran any labs or blood work.