Needing support...

Bird
I went for an ultrasound two weeks ago and was told I was measuring at 5+2. HCG was 990. Went back today and was told I'm measuring at 6+1 and HCG levels are 34,000. Barely saw heartbeat and told me that it is very low at 76. Doctors told me this evening that with baby measuring so far behind and my HCG levels being so high and heart rate so low that miscarriage was immenint and I should prepare for miscarriage. I am a nervous wreck. Has anyone else been in a similar situation and had everything turn out ok or should I just face the fact that it is over? Needing some type of feedback either way. Thank you for reading.