Thanks for your query.
Normally you get bleeding with in 4 hours of taking misoprostol
which you had.
To confirm whether abortion is complete you need to get an ultrasound
of pelvis done after 14 days of the medicine.
If the ultrasound report shows abortion is complete there is no reason to get worried but if it shows incomplete abortion
then you need to consult a Gynaecologist and she may do a D&C.
As far as the positive pregnancy
test please do not worry as the test comes positive due to the presence of HCG
hormone in urine.
The level of these hormones take time to revert back to normal (till then it will show in urine pregnancy test and the test may be positive).
Hope this answer is helpful to settle your fears.