There are three possibilities for your case, and as long as you have no bleeding and no sharp abdominal pains, I advise you to repeat the ultrasound
level after 1 week and accordingly:
1- negative level and empty uterus: a case of complete abortion (either the previous one or a new one).
2- negative level and still the same ultrasound picture: incomplete abortion
which requires evacuation either surgically or medically.
3- rising hcg level requires more patience as it may be a new healthy pregnancy
Finally I have 3 important comments:
1- from the three above mentioned possibilities I expect the second one.
2- the possibility of ectopic pregnancy should be excluded.
3- if you have a negative RH group and your partner is positive, you should receive anti-D injection.
Finally, I hope tese words were concise and usefull and I wish you the best of luck.
Dr. Ahmed Bahaa.