Medical termination of pregnancy.

Her period was on April 5. On April 21 we had intercourse. But all precautionary measures were take. After intercourse of 1 day she had unwanted 72. Next month on 5th may she had periods too but it was little bit light . The she tested with prega news on 7th and 12 th may which shows negative..but after testing urine on 19 th may there was a faint line. Then she tested beta serum HCG and her level was 1.7 . The doctor of our nearby area seeing the report has given to have mifty kit(1 mifeprostone and 4 misoprostol tablet). After having all those tablets she had no as such bleeding.. only few clots came out after having mifeprostone and some blood while having misoprostol.. but not like normal bleeding. Is the pregnancy get aborted? Why bleeding is so less? What should we do next? Is ustlrasound necessary?