Low rising HCG

I went in on 5/31 for my first ultrasound and could only see the empty yolk sac measuring 6 weeks. My HCG was 23101 that day, so my doc had me retest two days later (She was concerned that we didn't see a fetal pole or anything at that high HCG) on 6/2 my HCG only increased 3% to 238701. I retested 6/6 and it only increased by 40 to 23911. Is there any hope??? My next ultrasound is Friday, I'm guessing a nonviable pregnancy will be confirmed. Thoughts?