If u have changed your mind now , you want to continue this pregnancy.
Good news for u- only 1 dose of mifepristine is not enough to abort 4 month pregnancy.
Bad news for u- this drug might affect your baby's development.
Next Steps
all you can do is wait till 5th month of pregnancy.
get TIFFA( LEVEL 2 SCAN) done between 18-20 weeks .
Health Tips
the above mentioned scan will let u know if development of your baby is normal or not.
so for now, stay calm.
thank you