Now you consult gynecologist once and undergo ultrasound
to to confirm intrauterine pregnancy
and to rule out the ectopic pregnancy.
Then if the pregnancy is intrauterine, with your doctor's advice you can go for medical termination of abortion
Medical termination can be done with tablets and after undergoing general examination you can take them with your doctor's advice.
As you want to avoid the pregnancy better to use some regular contraceptive
methods in future.