Advice on ultrasound.

Unfourtunatly i was not given any pictures. Im estimated to be 6 weeks today, but my sac was only 2.5mm and looked empty. My hcg levels were also only 1624. I only found out because i went for bleeding due to anemia and threatened miscarriage. We also found i have an ovarian cyst the same size as my ovary thats making it swell. Im so worried about my baby. Any advice?