I had taken mifepristone and misoprostol tablets 6 months back when i was pregnant. There was immense bleeding and alot of pain and the abortion was successful. Unfortunately, i am pregnant again and have taken the tablets but they caused very minimal bleeding and cramps. I checked after two weeks and the pregnancy test was still positive. So i took the tablets again. Now, I am having bleeding but not as much as the first time and cramps are also not that painful. Why are the tablets not workg?