Miscarriage

Stephanie
Hoping for a miracle... We were 12 weeks and 3 days today and went in for our first unltrasound. The baby only measured at 8 weeks and 3 days and there wasn't a heartbeat.. Is there any way that this could be incorrect? We're wanting to have them look again just to be sure before we move forward.. Has anyone experienced this and then had it be wrong somehow? Or is there any way we were just off by a month calculation wise and that we really weren't as far along as we thought? Just reaching here and hoping for a miracle somehow... Please share if anything similar has happened and what the outcomes were