is possible even if penetration has not taken place and ejaculation has occurred near vaginal opening.But the most important point for conception to take place is that it should take place in fertile window of the female.This means 5 days before ovulation and 1 day of ovulation.This makes it only 6 days when a pregnancy can take place.
Another point is that there seems to be something wrong in your medication.Normally 200 mg of mifepristone is followed by 800 mcg of misoprostol
,after 48 hours.
Now just wait and watch for your periods.
If they don't take place,then confirm the pregnancy by urine test of pregnancy,and if confirmed,then go for proper dosage of mifepristone and misoprostol.
The best would be to talk to a Gynecologist and act accordingly.
There should not be any problem and so stop worrying.Every problem can be taken care of.