welcome to Health care magic. 1. The dose is enough, even after correct dosage there will be failures - which are expected in many cases. 2.Getting positive after taking MTP medication is normal, it does take unto 3-4 weeks to get negative results, and to get a normal periods does take good time ( 6-8 weeks and more) after the abortion / postpartum its normal. 3.But confirmatory is to get an ultrasound check scan done - for RPOC Retained products of conception, pregnancy again and condition of uterus and ovaries. 4.Suggest you to have an protected intercourse in future to avoid abortions. 5.As in long run it will cause difficulty in conceiving and regular periods. Good luck. Hope it helps you. Wish you a good health. Anything to ask ? do not hesitate. Thank you.