Hello, I would be happy to help you with your question.
It is still possible that the medication did not work to abort the fetus. At 8 weeks pregnant, you would have had a significant amount of bleeding. Given that it sounds like you did not bleed much, the chances are that you are still pregnant. An ultrasound
done as soon as possible will determine if this is the case. If you are still pregnant it is extremely unlikely that this has had any affect on your fetus. I would recommend that you talk about this with your doctor.
I hope that this helps and good luck - Please ask me if you have specific questions!