Slow rising hcg?

Sarah

I went to the ER on Thursday last week for some bleeding and cramping after getting a positive pregnancy test. My levels were only at 14, so the doctor said to get tested again a few days later. Here I am at the ER getting tested again Monday, 4 days later, and I’m only at 21. The doctor said they can’t rule out miscarriage just yet, so I’m getting an ultrasound done even though I’m too early along to see anything. I’m assuming it doesn’t look too good for me. I’m only about 3-4 weeks along. Anyone else gone through this?